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1
Smith, Stuart. "Reproductive performance and artificial insemination in pigs". Thesis, University of Nottingham, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321459.
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2
Dyer, Silke Juliane. "Strategies to improve artificial insemination by donor". Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/26264.
Testo completoAbstract (sommario):
Artificial insemination with donor sperm is a widely accepted form of treatment for severe male factor infertility. The introduction of quarantined, cryopreserved semen and the associated reduction in cycle fecundity when compared to fresh semen necessitated the development of strategies to improve the performance of frozen sperm. A prospective randomised clinical trail was undertaken in the Reproductive Medicine Unit at Groote Schuur Hospital to compare intrauterine insemination with intracervical insemination in a therapeutic donor insemination program with cryopreserved semen. The method of insemination was alternated in successive cycles in each patient after intitial randomised selection. Forty three patients underwent 61 intracervical insemination cycles and 48 intrauterine insemination cycles. Strict cycle control was exercised and the timing and frequency of insemination followed a specific protocol. Eighteen clinical pregnancies occurred following eleven intrauterine insemination cycles (22.9% per cycle) and seven intracervical insemination cycles (11.5% per cycle). Treatment outcome was influenced by patient age, the severity of the male factor and endometriosis. Most pregnancies followed insemination with 15 to 25 million motile sperm. Sperm fecundity differed amongst donors. The findings of our study and the current literature suggest that intrauterine insemination improves cycle fecundity in therapeutic donor insemination cycles with frozen donor sperm.
3
Ahangari, Yousef Jarari. "Cryopreservation of ram semen for artificial insemination". Thesis, Bangor University, 1992. https://research.bangor.ac.uk/portal/en/theses/cryopreservation-of-ram-semen-for-artificial-insemination(25836205-fd80-43ad-a725-ac602fb33b87).html.
Testo completoAbstract (sommario):
A theoretical study showed that Al can greatly affect the efficiency of sheep breeding schemes provided fertility is maintained at the highest levels. Factors that affect the survival of ram spermatozoa during preservation were studied. A pH range between 6 and 7 was well tolerated. The addition of 4% (v/v) glycerol to the diluted ram semen in Tris buffer lowered the motility and survival of spermatozoa during 5 hours of storage at 30'C. Following insemination of chilled ram semen, with and without glycerol in the diluent, lambing percentages of 59% and 73% respectively were obtained. Ram semen was frozen in 0.25 ml straws using various cooling combinations. The optimal procedure was found to be to cool rapidly from 5'C to -120'C at -20'C/min. When semen so treated was compared in a fertility trial with semen frozen by the pellet method of Evans and Maxwell (1987), lambing percentages of 14% and 18% respectively were obtained. Attempts were made to formulate a vitrifying diluent for ram semen. A method was developed for the assessment of semen in highly concentrated cryoprotective solutions. Semen tolerated 10% concentrations of each of glycerol, acetamide and propylene glycol applied together, but when concentrations were raised above this level sperm mortality was very high. A simple spectrophotometric procedure for the objective assessment of vigour of ram semen was developed and tested. Raffinose 66 mM in the freezing diluent improved the post-thawing revival rate of spermatozoa from 46% to 71%, and increased the post-thawing recovery of the swimmingup vigour (P< 0.01). Raffinose treatment reduced the ATP content of semen but did not reduce the rate of glucose oxidation by diluted spermatozoa at either the pre-freezing or post-thawing stages. Frozen storage of ram spermatozoa as pellets was best achieved using two volumes of Tris buffer diluent containing 18% (v/v) egg-yolk, 6% (v/v) glycerol and 66 mM raffinose to one volume of semen. The diluted semen was chilled to 5'C and frozen as 0.10 ml pellets on dry ice. For frozen storage of ram semen in 0.25 ml straws, best results were obtained when the Tris buffer diluent contained 18% (v/v) egg-yolk, 9% (v/v) glycerol and 66 mM raffmose, and cooling was at a rate of -30'C/min from 5'C to -120'C. Non-return rates were 21%, 20% and 31% for ewes inseminated with semen samples frozen as standard 0.20 ml pellets, as raffinose containing 0.10 ml pellets, and as raffinose containing 0.25 ml straws respectively. Of the in vitro tests, only the swim-up test was correlated with non-return rates (r=0.904, P< 0.1). Post-thawing survival of the spermatozoa was improved by the addition of raffinose which had no deleterious effect on fertility.
4
Laffoon, Michael R. "Artificial insemination and in vitro fertilization an Orthodox perspective /". Theological Research Exchange Network (TREN), 1986. http://www.tren.com.
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5
Kozink, Daniel Michael. "Enhancing Boar Reproductive Performance for Purposes of Artificial Insemination". Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/46182.
Testo completoAbstract (sommario):
The objectives were to: 1) determine if im treatments of Lutalyse expedited the training of sexually inexperienced boars for semen collection and increased spermatozoal output, and 2) determine the effects of dietary L-carnitine supplementation on boar libido, semen quality, sperm production, and maintenance of sperm motility during liquid storage. Experiment 1 utilized lean-type, terminal-line boars (National Pig Development, Roanoke Rapids, NC) (n = 40; 177.4 ± 2.4 d of age and 112.8 ± 2.0 kg body weight) that had not previously experienced natural mating. Boars were individually moved twice weekly for 6 weeks (total of 12 training sessions) to a semen collection room equipped with an artificial sow. Upon entering the semen collection room, boars received in treatments of either deionized water (4 mL, n = 10) or Lutalyse at doses of 5 mg (n = 10), 10 mg (n = 10), or 20 mg (n = 10), and subsequently received a libido score of 1 to 5 (1 = no interest in the artificial sow; 5 = mounting the artificial sow and allowing semen collection). The percentages of boars successfully trained for semen collection during the experimental period were similar (P > 0.05) for controls (20%) and boars receiving 5 mg (30%), 10 mg (20%), or 20 mg (10%) of Lutalyse. Average libido score for boars receiving 10 mg Lutalyse (2.35 ± 0.08) was greater (P < 0.05) than for controls (2.14 ± 0.06). Libido score for the 20 mg treatment group were (1.78 ± 0.06) lower (P < 0.05) compared to the other treatment groups. Characteristics of ejaculates (volume, gel weight, sperm concentration, total spermatozoa) from control boars and boars treated with Lutalyse at doses of 5, 10, or 20 mg were similar (P > 0.05). For Exp. 2, the same group of boars was utilized in two similar trials (Trial 1, 1a, 1b: n = 9 for control and L-carnitine-treated boars; Trial 2, 2a, 2b: n = 10 for control and L-carnitine-treated boars). Boars were fed a fortified, corn and soybean meal-based diet at a rate of 2 kg/d. Boars that were randomly selected for L-carnitine treatment received the same diet mixed with L-carnitine to achieve supplementation of 500 mg/d. For 16 wk, semen was collected weekly via the gloved hand method and was analyzed for gel-free volume, gel weight, sperm concentration, sperm per ejaculate, and characteristics of sperm motility. Time to ejaculation (reaction time), duration of ejaculation, and number of false mounts were also recorded for each collection. Trials 1a and 2a were conducted during weeks 16 and 17 for each respective trial. Boars were collected once on 4 consecutive days, allowed 4 d of rest, and then collected again, to estimate daily spermatozoal production. At the end of 16 wk, a semen sample was also processed and extended in Beltsville Thawing Solution (BTS) to achieve a dilution of 3 x 109 spermatozoa/100 mL-dose for Trials 1b and 2b. The extended semen was stored in plastic bottles at 18°C and motility was evaluated daily for 7 d post collection. L-carnitine supplementation for 16 wk had no effects on semen volume, gel weight, total number of sperm cells per ejaculate, reaction time, or sperm motility (P > 0.1). Boars receiving the L-carnitine-supplemented diet displayed an increase in the number of false mounts before ejaculating and an increase in sperm concentration (P < 0.05) in Trial 2. A treatment by week interaction was detected for sperm concentration in Trial 2 (P < 0.005). Increased sperm concentrations in L-carnitine-treated boars were demonstrated after only one week of feeding the respective diets. Given that the production of a mature sperm cell requires 7 to 8 wk in boars, it is therefore difficult to conclude that differences in sperm concentration were due solely to treatment. Daily spermatozoal production was similar between control boars and boars supplemented with L-carnitine (P > 0.1) for both Trials 1a and 2a. L-carnitine supplementation did not affect percent motility in Trials 1b and 2b or sperm progressive motility in Trial 2b during 7 d storage (P > 0.1). A treatment by day interaction was determined for sperm velocity (P < 0.05) in Trial 2b. L-carnitine supplementation decreased mean sperm velocity significantly after 2 d of storage. Overall, L-carnitine had no beneficial effects on boar libido, semen quality, sperm production, or maintenance of sperm motility during liquid storage. However, Lutalyse increased libido scores, but did not affect the number of boars trained for semen collection or number of spermatozoa ejaculated.Master of Science
6
Wiswedel, Klaus. "Sperm cryopreservation and artificial insemination at Groote Schuur Hospital". Master's thesis, University of Cape Town, 1987. http://hdl.handle.net/11427/25895.
Testo completoAbstract (sommario):
The diagnosis and therapy managed by the specialities of infertile couples is traditionally of Gynaecology and Andrology. The latter is a subspeciality, which should combine the knowledge of urologists and gynaecologists in the treatment of sub or infertile men.
7
Januskauskas, Aloyzas. "Assessment of viability and function of post-thaw spermatozoa from Swedish dairy AI bulls /". Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5435-2.pdf.
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8
Gil, Laureiro Jorge. "Fertility of frozen ram semen under field conditions : with special reference to influence of extenders and freezing procedures /". Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-5941-9_1+2.pdf.
Testo completo
9
Melo, Leonardo de França e. "Progesterone-based fixed-time artificial insemination protocols for dairy cows". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-30092016-150847/.
Testo completoAbstract (sommario):
In the last 50 years, milk production increased in lactating dairy cows. In contrast, reproductive efficiency has dramatically decreased. Several causes may be involved, such as management and environmental factors, physiological and nutritional factors, disease challenges and others. Steroid hormone concentrations in high-producing lactating dairy cows are often at lower levels, due to high dry matter intake and increased liver blood flow and steroid hormones metabolism, which is associated with the compromised estrus expression and reduced oocyte quality, thus decreasing fertility. However, with the largely use of FTAI programs, fertility has turned the corner with current reports of increasing reproductive efficiency. Given the great number and variations on E2/P4-based FTAI protocols, three studies were performed involving different hormonal combinations and are presented in two chapters in this thesis. The first study aimed to compare the ovarian dynamics and fertility using two different treatments at the initiation of a P4-based FTAI protocol, GnRH vs. EB, combined with two different treatments at the end of the protocol, EB vs. ECP. For this study, 1,035 lactating cows were completely randomized into one of four treatments: GnRH-EB, GnRH-ECP, EB-EB, EB-ECP. Interactions and treatments at the end of the protocol did not affect fertility. However, GnRH rather than EB at the beginning tended to increase P/AI and greater proportion of cows regressed the CL when EB was used. The second study aimed to compare plasma P4 concentrations in non-lactating Holstein cows fitted implanted with new (New), or 8-days used intravaginal P4 implants previously autoclaved (Aut) or disinfected (Dis), and containing 1.9 or 1.0 g of P4. Using a 2x3 factorial arrangement of treatments, 24 cows were randomly assigned to two of six treatment groups (two replicates). Mean circulating P4 during 8 days with P4 implant were the following regarding treatments: 1.9 g > 1.0 g; 1.9 g: Aut > New > Dis; 1.0 g: Aut = New > Dis (P < 0.05). The third experiment was performed with 349 cows in two farms and aimed to compare P4 concentrations, ovarian dynamics and fertility during use of 1.9 g Aut or Dis intravaginal P4 implants, in lactating Holstein cows submitted to a 10-day long E2/P4-based FTAI protocol, combined with GnRH treatment at the beginning of the protocol. Slight variations in P4 concentrations were observed between treatments, which did not affect follicular dynamics, synchronization rate or P/AI. However, presence of CL or ovulation at the beginning of the FTAI protocol affected several reproductive variables, such as the time and synchronization of the follicular wave emergence, proportion of cows in estrus at the end of the protocol and size of the ovulatory follicle, and more overall synchronized cows became pregnant to the FTAI protocol.A produção de leite em bovinos aumentou consideravelmente nos últimos 50 anos. Inversamente, a eficiência reprodutiva vem diminuindo consistentemente. Vários fatores estão envolvidos, tais como manejo e ambiência, fatores fisiológicos e nutricionais, desafios sanitários, entre outros. As concentrações sanguíneas de hormônios esteroides em vacas leiteiras são baixas, devido à elevada ingestão de matéria seca e ao elevado fluxo sanguíneo hepático e metabolismo, os quais estão associados às alterações na expressão do estro e na qualidade de gametas, reduzindo assim a fertilidade. Entretanto, com o largo uso de programas de IATF, a fertilidade vem aumentado bem como a eficiência reprodutiva. Em função da grande quantidade e variações nos protocolos de IATF à base de E2/P4, três estudos foram realizados envolvendo diferentes combinações hormonais, os quais estão apresentados em dois capítulos desta tese. O primeiro estudo objetivou comparar a dinâmica ovariana e a fertilidade com o uso de dois tratamentos hormonais ao início do protocolo à base de P4, GnRH vs. BE, combinados com dois tratamentos no final do protocolo, BE vs. ECP. Para este estudo, 1.035 vacas lactantes foram aleatorizadas em um de quatro tratamentos: GnRH-BE, GnRH-ECP, BE-BE, BE-ECP. Interações e os tratamentos ao final do protocolo não afetaram a fertilidade. No entanto, o GnRH no início do protocolo tendeu a melhorar a P/IA, comparado ao BE, o qual foi responsável por uma grande proporção de vacas regredindo o CL durante o protocolo. O segundo estudo objetivou comparar as concentrações plasmáticas de P4 em vacas holandesas não lactantes entre dispositivos intravaginais de P4 novos (Novo), ou com 8 dias de uso, previamente autoclavados (Aut) ou desinfetados (Des) e contendo 1,9 ou 1,0 g de P4. Em um arranjo fatorial 2x3, aleatorizou-se 24 vacas em dois dos seis tratamentos (duas réplicas). A P4 circulante média nos 8 dias com implante de P4 foi a seguinte em relação aos tratamentos: 1,9 g > 1,0 g; 1,9 g: Aut > Novo > Des; 1,0 g: Aut = Novo > Des (P < 0.05). O terceiro experimento objetivou comparar as concentrações de P4, a dinâmica ovariana e a fertilidade durante o uso de implante Aut ou Des com 1,9 g de P4, em 349 vacas holandesas lactantes submetidas a um protocolo de IATF à base de E2/P4, combinado com GnRH no início do protocolo. Pequenas variações foram verificadas entre os tratamentos nas concentrações de P4, porém sem efeito na dinâmica folicular, na taxa de sincronização e na P/IA. Contudo, a ciclicidade ou a ovulação no início do protocolo influenciaram variáveis reprodutivas, tais como o momento e a sincronização da emergência da onda folicular, a proporção de vacas em cio ao final do protocolo e o tamanho do folículo ovulatório. Além disso, mais vacas sincronizadas ao protocolo ficaram gestantes.
10
Dorsey, Benjamin Reese. "Effect of Timing of Insemination and Synchronization of Estrus Method on Artificial Insemination (AI) Pregnancy Rates in Beef Heifers". Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/42873.
Testo completoAbstract (sommario):
Objectives were to evaluate time of insemination relative to estrus and synchronization with melengestrol acetate (MGA) plus prostaglandin (PG) or progesterone insert (CIDR) plus PG on AI pregnancy rate in beef heifers (n = 662) during Fall or Spring. Fall heifers (n = 349) received MGA-PG (MGA for 14 d followed by PG on d 18) or CIDR-PG (CIDR for 7 d, PG administered 1 d before CIDR removal). Estrus was monitored by HeatWatch® (n = 200) or visually (n = 149). Spring heifers (n = 313) underwent CIDR-PG with detection of estrus by HeatWatch®. Heifers not in estrus by 96-100 h after PG were bred AI as non-responsive AI (NRAI). Across seasons, 548 heifers were bred following estrus (EAI). Heifers synchronized during the Fall with MGA received more (P < 0.05) mounts than Fall CIDR heifers (76.8 ± 6.7 and 47.6 ± 7.4, respectively), but duration of estrus was similar. Fall CIDR heifers had greater (P < 0.05) mounting activity and duration of estrus (47.9 ± 5.2 mounts and 15.5 ± 1.1 h) compared to Spring CIDR heifers (34.5 ± 3.1 mounts and 12.7 ± 0.6 h). Heifers grouped in 4 h blocks from 0 to 24 h had no difference (P > 0.05) in pregnancy rates (mean 62.5 %). Treatment had no effect (P > 0.05) on EAI pregnancy rates. Pregnancy rates across seasons for EAI, NRAI and overall was 61.0 %, 26.3 %, and 54.5%. In conclusion, a 24 h window may exist to successfully AI heifers.Master of Science
11
Behan, John. "The utilisation of artificial insemination in swine at reduced sperm cell concentration, and the subsequent effect upon fertility and fecundity". Thesis, Royal Veterinary College (University of London), 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618281.
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12
DeJarnette, James Melton. "The effects of sperm dose, semen quality, and retrograde sperm blockage on accessory sperm number and embryo quality in the artificially inseminated bovine". Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41929.
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13
Falchi, Laura. "Transcervical artificial insemination and physiology of the cervix of the sheep". Thesis, Royal Veterinary College (University of London), 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.558963.
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14
McCarthy, Brendan. "An examination and evaluation of the debate encompassing the Warnock Committee's Report on Human Fertilisation and Embrology : theological and ethical implications". Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239012.
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15
Nadir, Sher. "Effect of high and low dosage of fresh and frozen semen on accessory sperm number, fertility and embryo quality in artificially inseminated cattle". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-10222009-125208/.
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16
Hill, Scott L. "Serum and plasma metabolites and insemination timing associated with greater pregnancy risk in suckled beef cows subjected to artificial insemination programs". Diss., Kansas State University, 2016. http://hdl.handle.net/2097/34458.
Testo completoAbstract (sommario):
Doctor of PhilosophyDepartment of Animal Sciences and Industry
Jeffrey S. Stevenson
Four experiments were conducted in beef cows to determine factors that increased the probability of pregnancy per AI when cows are inseminated by appointment. Cows in all experiments were inseminated after a 7-d CO-Synch + CIDR program (100 μg GnRH [2 mL Factrel, Pfizer Animal Health, Whitehouse Station, NJ] 7 d before 25 mg PGF₂[subscript]α [d 0; 5 mL Lutalyse; Pfizer Animal Health]). Experiment 1 compared 1 vs. 2 inseminations and GnRH injection times at 60 and 75 h after the CO-Synch + CIDR program. Delaying AI until 75 h, according to interpretation of estrus-detection patches, for cows not in estrus by 60 h after CIDR insert removal increased (P < 0.05) pregnancy risk (PR) compared with cows not in estrus and inseminated at 60 h (51.4 vs. 41.7%), respectively. The necessity of GnRH injection concurrent with AI was tested in experiment 2. Cows displaying estrus by 65 h that were injected with GnRH had similar PR to cows in estrus and not treated with GnRH (61.9 vs. 60.4%), respectively. Cows in experiment 2 that did not display estrus, but were treated with a GnRH injection at 65 h and then inseminated at 84 h after CIDR insert removal had increased PR compared with similar cows not treated with GnRH (33.4 vs. 15.0%; P < 0.01), respectively. Experiments 3 and 4 were observational studies conducted to determine if blood metabolites glucose and beta-hydroxy butyrate (BHB experiment 3), or physical body and blood metabolites, (glucose, BHB, non-esterified fatty acids [NEFA], blood urea nitrogen [BUN], body weight, rump fat [RF], or BCS; experiment 4) were indicative of future reproductive success in suckled beef cows enrolled in a timed AI program. In experiment 3, plasma glucose concentration 10 d before AI was lesser (P = 0.01; 52.2 vs. 56.9 mg/dL) and serum BHB concentration was lesser (P < 0.01) in cows that became pregnant 35 d after timed AI than for cows that did not become pregnant (600 vs. 690 μM), respectively. Experiment 4 identified relationships between indicators and reproductive success including the finding that serum NEFA concentration 2 to 4 wk before AI is negatively correlated (P < 0.05) with PR to AI.
17
Quintana, Casares Pablo Ignacio. "Studies on the relationship between characteristics of ram semen and fertility". Title page, contents and summary only, 1991. http://web4.library.adelaide.edu.au/theses/09PH/09phq7.pdf.
Testo completoAbstract (sommario):
Includes bibliographical references (leaves 274-316) Examines several aspects of male reproduction in the sheep, and how these are related to fertility in the female when semen is introduced by natural mating or artificial insemination.
18
Cheung, Ka-lung. "Proteomic profiling of uterine flushing from IVF patients : comparison between natural and stimulated cycles /". View the Table of Contents & Abstract, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36434164.
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19
Samo, Mohammed Uris. "Studies on the preservation of ram semen". Thesis, Bangor University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389688.
Testo completo
20
Al-Furaiji, Mansour M. A. "The use of a monoclonal antibody to pregnant mare serum gonadotrophin in superovulation of cattle". Thesis, University of Aberdeen, 1989. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU602258.
Testo completoAbstract (sommario):
Embryo transfer plays a very important role in the cattle industry and its application requires a consistent supply of viable embryos for use in such programmes. One way of achieving this is the development of reliable superovulation regimens, yielding a large number of high quality embryos. Superovulation with pregnant mare serum gonadotrophin (PMSG) induces a second wave of follicles after ovulation because it is eliminated slowly from the peripheral blood, causing high concentrations of oestradiol. This oestradiol may have an adverse effect on fertilization and early embryonic development. Administering PMSG antiserum after ovulation may improve the quality by neutralizing PMSG activity. The object of this study was to examine the role of monoclonal anti- PMSG (Neutra-PMSG; Intervet UK) in a superovulatory regime for cattle based on PMSG with the objective of increasing the number of viable embryos produced. Two experiments were conducted in this study. In experiment 1, cows were superovulated with 2500 iu of PMSG (Folligon; Intervet UK) im on day 101 of their oestrous cycle, whereas in experiment 2, heifers were superovulated with 1000, 2000, 3000 or 4000 iu of PMSG (PMSG1, 2, 3 or 4, respectively) im on day 10 1 of their oestrous cycle. In experiments 1 and 2, animals were given 2 ml of PG (PG3) im 48 h after PMSG injection and oestrus was observed in the same manner as described above. When data were evaluated in respect of the PMSG/APMSG dose level, there were no significant differences (P>0.05) in the numbers of CL and usable number of embryos between APMSG treatment and the appropriate control. Treatment with APMSG in the 3000 iu PMSG dose group reduced (P 0.05) the numbers of LF compared to control (1.3 v 5.5). When data were analysed based on the dose levels of PMSG, the total number of ova/embryos and the number of usable embryos were higher in heifers which received 2000 iu of PMSG compared to those which received 1000, 3000 or 4000 iu (7.1 v 2.1, 6.6 or 5.6 and 6.3 v 2.1, 4.8 or 3.2, respectively) . In conclusion the results indicate that PMSG dose 2000 iu is the favoured dose for superovulating heifers. The administration of Neutra-PMSG 36, 48, 60, 72, 84 or 96 h after PG3 injection, despite reducing LF numbers and preventing the rise in 0E2 after ovulation, had no significant effect on the number of usable embryos recovered.
21
Chirinéa, Viviane Helena [UNESP]. "Inseminação artificial com sêmen congelado em cães". Universidade Estadual Paulista (UNESP), 2008. http://hdl.handle.net/11449/105987.
Testo completoAbstract (sommario):
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chirinea_vh_dr_botfmvz.pdf: 377109 bytes, checksum: 14a2afeb1c35186ec50ee38a1a81ba09 (MD5)Universidade Estadual Paulista (UNESP)
A inseminação artificial (IA) utilizando sêmen congelado é uma ferramenta importante na reprodução de cães, visa o melhoramento genético e melhor aproveitamento do reprodutor. Além disso, a melhor metodologia para avaliar o potencial fecundante de uma amostra de sêmen é o teste in vivo. Por isso, os objetivos deste trabalho foram determinar a taxa de gestação de cadelas, utilizando sêmen congelado em meio diluente TRIS/OEP/Frutose/8%Glicerol, e comparar duas técnicas de IA: intra-uterina, por laparotomia e intravaginal. O sêmen foi colhido de um único macho, por manipulação digital do pênis e analisado, imediatamente, após a colheita e após a descongelação a 70°C, por 8 segundos. A cinética do movimento foi verificada pelo CASA (Computer Assisted Semen Analyzer), e a integridade das membranas por: sondas fluorescentes (iodeto de propídio e carboxifluoresceína), pelo teste supra vital com a coloração de eosina, e pela associação de sondas (iodeto de propídio, JC-1 e FITC-PSA). A morfologia espermática foi avaliada por meio de esfregaços corados com Karras. A congelação do sêmen foi realizada pelo método descrito por Chirinéa et al. (2006). As fêmeas foram monitoradas desde o início da fase do proestro utilizando a citologia vaginal seriada e a dosagem de progesterona sérica, a cada 48 horas. Para as inseminações, as cadelas foram divididas em dois grupos: Grupo 1 (n=6) inseminadas uma única vez, via intra-uterina, por laparotomia, com uma dose inseminante de 160 x 106 espermatozóides/2mL; e Grupo 2 (n=6) inseminadas duas vezes, via intravaginal com uma dose inseminante de 160 x 106 espermatozóides/2 mL por inseminação. Os resultados das análises do sêmen pré e pós-descongelação não apresentaram diferenças significativas, com exceção da morfologia espermática e da associação de sondas fluorescentes...
Artificial insemination (AI) using frozen semen is an important tool on dog’s reproduction, aiming to genetic improvement and better use of a stud. Besides, the better way to evaluate the fecundate potential of a semen sample is an in vivo test. That way, the aim of this work was to determine the pregnancy rate in bitches, using TRIS/OEP/Fructose/8%Glycerol as the diluent medium, and to compare two AI techniques: intrauterine and intravaginal. Semen was collected from one male only, by digital manipulation. Semen was analyzed immediately after collection and after thawed at 70°C for 8 seconds. Movement kinetics were analyzed by CASA (Computer Assisted Semen Analyzer), membrane integrity using fluorescents probes (propidium iodide and carboxyfluorescein), supravital test, eosin staining, integrity of plasmatic, nuclear and mitochondrial membranes using the association of fluorescent probes (FITC-PSA, propidium iodide and JC-1) and sperm morphology. Semen was frozen using the method described by Chirinéa, 2006. Females were monitored since the beginning of proestrus, using vaginal smear and progesterone measurement, each 48hours. To inseminations, bitches were divided into two groups: Group 1, composed by 6 females, which were inseminated just once via intrauterine, with an insemination dose of 160 x 106 spermatozoids/2mL and Group 2 constituted by 6 females, which were inseminated twice, via intravaginal, using an insemination dose of 160 x 106 spermatozoids/2 mL/insemination. Results from semen analyses made before and after freezing did not show any difference, except for sperm morphology and association of fluorescents probes. Pregnancy rate was 66,6% (4/6) on Group 1 and 16,6% (1/6) on Group 2. In conclusion, the success of artificial insemination depends not only on semen quality after thawed, but also on the AI technique used. In our work, intrauterine technique by laparotomy was better than intravaginal.
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Nakafeero, Angella. "Response to different oestrous synchronisation protocols and fertility of ewes following artificial insemination". Diss., University of Pretoria, 2009. http://hdl.handle.net/2263/67834.
Testo completoAbstract (sommario):
The response of South African Mutton Merino (SAMM) ewes to synchronisation of oestrus and fertility following different protocols and artificial insemination (AI) were studied using data collected during the autumn breeding season. The study was aimed at comparing the effect of long and short-term progesterone (P4) treatment and their combination with either equine chorionic gonadotropin (eCG) or the ram effect (Ram) on oestrous response and fertility of ewes. Ewes (n = 78) were randomly allocated to four treatment groups in a 2×2 factorial design and primed with controlled internal drug release (CIDR) for a 9 (short) or 14 d (long) period. At CIDR withdrawal, ewes in each group received either a single intramascular injection of equine chorionic gonadotrophin (eCG; 300 IU) or exposure to the ram effect; eCGshort (n=19), Ramshort (n=21), eCGlong (n=19) and Ramlong (n=19). Oestrous behaviour was monitored from 12-84 h post CIDR withdrawal and ultrasound performed at 48 h post CIDR withdrawal to examine number and diameter of follicles. Artificial insemination (AI) was performed twice at 48 and 60 h post CIDR withdrawal with fresh undiluted semen using the cervical method. Non-return rate (NRR) was monitored 15-21 d post AI while pregnancy diagnosis was performed by transrectal ultrasound at 35 d post AI and confirmed by lambing data. Oestrous behaviour was observed in 98.7% of all synchronised ewes, with no significant difference between treatment groups. Overall, CR and the proportion of ewes lambing to synchronised oestrus were (74.4% and 52.6%, respectively). There was no significant difference between treatment groups in oestrus response, onset of oestrus, duration of oestrus, number of follicles, diameter of the largest follicle, NRR, conception rate (CR), AI to lambing interval, twinning rate and number of lambs born. When data were pooled, CIDR-14 d protocols showed a significantly shorter interval to onset of oestrus (24.9 ± 1.6 versus 30.8 ± 2.1, P < 0.05) than CIDR-9 d protocols but there was no difference (P > 0.05) between eCG and Ram protocols when data were pooled. CIDR-9 d protocols resulted in a significantly higher CR (85.0% versus 63.2%, P < 0.05 ) than CIDR-14 d protocols when data were pooled but there was no difference (P > 0.05) in CR between eCG and Ram protocols. Mean AI to lambing interval was 158.2 ± 1.2 d, ranging from 147-154 d and 166-186 d post AI. The proportion of ewes lambing to synchronised oestrus per treatment group were (eCGshort (52.6%), Ramshort (42.9%), eCGlong (63.2%), Ramlong (52.6%), P > 0.05). Therefore, it can be concluded that the 4 protocols investigated were effective in synchronising oestrus with similar response to synchronisation of oestrus and fertility between treatment groups. Of the 4 protocols, the Ramlong protocol offers the benefit of reduced cost, reduced hormonal use and adequate fertility compared to other protocols. In addition, the cost of labour involved is foregone and a safer product is disposed of to the environment compared to use of the eCGlong and Ramshort or eCGshort protocols respectively.Dissertation (MSc (Agric))--University of Pretoria, 2018.
Animal and Wildlife Sciences
MSc (Agric)
Unrestricted
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Samuelson, David J. "Accuracy of predicting genetic merit of A.I. sampled bulls from pedigree information and the impact of son's proof on dam's PTA". Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09292009-020134/.
Testo completo
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Alexander, Dayna C. "Effect of delaying insemination in beef heifers not expressing estrus by 48 hours after a 7-d CO-Synch plus controlled internal drug release timed artificial insemination protocol". Thesis, Kansas State University, 2016. http://hdl.handle.net/2097/34522.
Testo completoAbstract (sommario):
Master of ScienceDepartment of Animal Sciences and Industry
Karol E. Fike
David M. Grieger
Synchronizing estrus before AI is an effective way to shorten the breeding season, and increasing the number of pregnancies per AI may lead to greater use and acceptance of synchronization protocols among beef producers. Our objective was to determine if pregnancy rates to fixed-time AI (FTAI) would be improved by delaying insemination in heifers not expressing estrus before FTAI in a 7-d CO-Synch + controlled internal drug release (CIDR) estrus-synchronization protocol. In Experiment 1, yearling beef heifers (n = 465) at three locations of commercial and purebred herds were treated with GnRH (Cystorelin 100 µg im) and a CIDR insert (1.38 g of progesterone) on Day 0. On Day 7 CIDR inserts were removed and all heifers received PGF[subscript]2α (Lutalyse 25 mg im) and were fitted with an estrus-detection patch (Estrotect; Rockway, Inc.). Heifers were assigned to three treatments based on estrus-detection patch color at 48 h after PGF[subscript]2α: (1). Estrus-Red 48 h (Red 48; n = 180), heifers that expressed estrus and were inseminated at 48 h; (2). Non-Estrus-Gray 48 h (Gray 48; n = 137) heifers that did not express estrus and were inseminated at 48 h; and (3). Non-Estrus Delayed- 56 h (Gray 56; n = 148), heifers that did not express estrus at 48 h, and were not inseminated until 56 h after PGF[subscript]2α. Pregnancy rate to AI was greatest (P < 0.0001) for Red 48 heifers (67.8%) compared with heifers in the Gray 48 (39.4%) and Gray 56 (42.6%) treatments. Heifers assigned to Gray 48 and Gray 56 achieved similar (P = 0.83) pregnancy rates. In Experiment 2, yearling beef heifers (n = 257) at two different locations were treated with the same 7-d CO-Synch protocol, but heifers were assigned to three different treatments based on estrus-detection patch color at 48 h after PGF[subscript]2α: (1). Estrus-Red 48 h (Red 48; n =95), heifers that expressed estrus and were inseminated at 48 h; (2). Non-Estrus-Gray 48 h (Gray 48; n = 84), heifers that did not express estrus but were inseminated at 48 h; and (3). Non-Estrus Delayed- 72 h (Gray 72; n = 78), heifers that did not express estrus at 48 h, and were not inseminated until 72 h after PGF[subscript]2α. Pregnancy rate to AI was greatest (P = 0.004) for Red 48 heifers (62.1%) compared with heifers in Gray 48 (40.5%), and Gray 72 (46.2%). No difference in pregnancy rates (P = 0.75) was detected between heifers assigned to treatments Gray 48 and Gray 72. Delaying insemination in heifers not expressing estrus by 48 h after PGF[subscript]2α did not improve pregnancy rates to AI.
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Rütz, Eva Maria K. "Heterologe Insemination - die rechtliche Stellung des Samenspenders Lösungsansätze zur rechtlichen Handhabung /". Berlin : Springer, 2008. http://site.ebrary.com/id/10217538.
Testo completo
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Saravia, Fernando. "Deep freezing of concentrated boar semen for intra-uterine insemination /". Uppsala : Swedish University of Agricultural Sciences, 2004. http://epsilon.slu.se/9815944.pdf.
Testo completo
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Fitzgerald, Robert. "A Comparison of Intrauterine and Cervical Artificial Insemination Rods on Farrowing Rate and Litter Size in Artificially Mated Sows". TopSCHOLAR®, 2005. http://digitalcommons.wku.edu/theses/496.
Testo completoAbstract (sommario):
This experiment compared the effects of two artificial insemination (AI) rods on farrowing rate and number of piglets born per litter. Three hundred eighty-nine sows were allotted into two experimental groups based on parity, body condition, and breed of sire influence of the sows. One hundred ninety-three matings were performed using the experimental intrauterine rod, and one hundred ninety-six matings were performed using the traditional cervical rod as the control. Total number of piglets born per litter was measured after each sow farrowed, and the farrowing rates were calculated at the end of the study. Farrowing rates were 68% and 66% and total number of piglets born per litter was 9.39 ± 0.55 and 9.74±0.53 for the experimental and control groups. Number of piglets born alive per litter was slightly lower than the total number of piglets born per litter for both groups, 8.97±0.54 and 9.29 ±0.52. The total number of piglets born per litter and the farrowing rates were not significantly (P > 0.05) different between the experimental and control groups. Results from this trial produced no incentive to use the intrauterine AI rod in this or other similar commercial settings.
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Chirinéa, Viviane Helena. "Inseminação artificial com sêmen congelado em cães /". Botucatu : [s.n.], 2008. http://hdl.handle.net/11449/105987.
Testo completoAbstract (sommario):
Orientador: Maria Denise LopesBanca: Frederico Ozanan Papa
Banca: Gilson Hélio Toniollo
Banca: Isabel Candia Nunes da Cunha
Banca: Fabiana Ferreira de Souza
Resumo: A inseminação artificial (IA) utilizando sêmen congelado é uma ferramenta importante na reprodução de cães, visa o melhoramento genético e melhor aproveitamento do reprodutor. Além disso, a melhor metodologia para avaliar o potencial fecundante de uma amostra de sêmen é o teste in vivo. Por isso, os objetivos deste trabalho foram determinar a taxa de gestação de cadelas, utilizando sêmen congelado em meio diluente TRIS/OEP/Frutose/8%Glicerol, e comparar duas técnicas de IA: intra-uterina, por laparotomia e intravaginal. O sêmen foi colhido de um único macho, por manipulação digital do pênis e analisado, imediatamente, após a colheita e após a descongelação a 70°C, por 8 segundos. A cinética do movimento foi verificada pelo CASA (Computer Assisted Semen Analyzer), e a integridade das membranas por: sondas fluorescentes (iodeto de propídio e carboxifluoresceína), pelo teste supra vital com a coloração de eosina, e pela associação de sondas (iodeto de propídio, JC-1 e FITC-PSA). A morfologia espermática foi avaliada por meio de esfregaços corados com Karras. A congelação do sêmen foi realizada pelo método descrito por Chirinéa et al. (2006). As fêmeas foram monitoradas desde o início da fase do proestro utilizando a citologia vaginal seriada e a dosagem de progesterona sérica, a cada 48 horas. Para as inseminações, as cadelas foram divididas em dois grupos: Grupo 1 (n=6) inseminadas uma única vez, via intra-uterina, por laparotomia, com uma dose inseminante de 160 x 106 espermatozóides/2mL; e Grupo 2 (n=6) inseminadas duas vezes, via intravaginal com uma dose inseminante de 160 x 106 espermatozóides/2 mL por inseminação. Os resultados das análises do sêmen pré e pós-descongelação não apresentaram diferenças significativas, com exceção da morfologia espermática e da associação de sondas fluorescentes... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Artificial insemination (AI) using frozen semen is an important tool on dog's reproduction, aiming to genetic improvement and better use of a stud. Besides, the better way to evaluate the fecundate potential of a semen sample is an in vivo test. That way, the aim of this work was to determine the pregnancy rate in bitches, using TRIS/OEP/Fructose/8%Glycerol as the diluent medium, and to compare two AI techniques: intrauterine and intravaginal. Semen was collected from one male only, by digital manipulation. Semen was analyzed immediately after collection and after thawed at 70°C for 8 seconds. Movement kinetics were analyzed by CASA (Computer Assisted Semen Analyzer), membrane integrity using fluorescents probes (propidium iodide and carboxyfluorescein), supravital test, eosin staining, integrity of plasmatic, nuclear and mitochondrial membranes using the association of fluorescent probes (FITC-PSA, propidium iodide and JC-1) and sperm morphology. Semen was frozen using the method described by Chirinéa, 2006. Females were monitored since the beginning of proestrus, using vaginal smear and progesterone measurement, each 48hours. To inseminations, bitches were divided into two groups: Group 1, composed by 6 females, which were inseminated just once via intrauterine, with an insemination dose of 160 x 106 spermatozoids/2mL and Group 2 constituted by 6 females, which were inseminated twice, via intravaginal, using an insemination dose of 160 x 106 spermatozoids/2 mL/insemination. Results from semen analyses made before and after freezing did not show any difference, except for sperm morphology and association of fluorescents probes. Pregnancy rate was 66,6% (4/6) on Group 1 and 16,6% (1/6) on Group 2. In conclusion, the success of artificial insemination depends not only on semen quality after thawed, but also on the AI technique used. In our work, intrauterine technique by laparotomy was better than intravaginal.
Doutor
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Cheung, Ka-lung, e 張嘉隆. "Proteomic profiling of uterine flushing from IVF patients: comparison between natural and stimulated cycles". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B4501064X.
Testo completo
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Chan, Po-heung, e 陳寶香. "Use of letrozole versus clomiphene citrate for superovulation in patients undergoing intrauterine insemination : a systematic review". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206904.
Testo completoAbstract (sommario):
Background:
Intrauterine Insemination (IUI)is one of the common first-line assisted reproductive technologies (ART) for couples suffering infertility. Controlled ovarian stimulation (COH) with clomiphene citrate (CC) or aromatase inhibitor (like Letrozole) is often used in adjunct to IUI to increase the pregnancy outcome. Both CC and letrozole can be given alone as a single ovulation induction agent or they can be combined with injectable gonadotropin for purpose of superovulation.
Study objectives:
To systematically review the efficacy and adverse outcomes of letrozole and CC for supervulation in infertility patients undergoing IUI.
Method:
Systematic review of pertinent randomised controlled trials (RCT) using the bibliographic databases EMBASE, PubMed, Cochrane, Medline (OVID), Academic Search Premier and CINAHL. References of selected articles identified were hand-searched for additional relevant citations. RCTs that have compared the pharmacological performance of CC and letrozole as a single agent or combination with equal dose of gonadotropins were included.
Results:
Ten published randomized controlled trials were included in this review. The mean age, infertility diagnosis and duration of infertility of the recruited participants were comparable. Pregnancy rate was found to be comparable in clomiphene citrate (CC) group and letrozole (L) group. Higher peak estrogen concentration and greater number of dominant follicles were reported in CC group. Endometrial thickness was found significantly greater in L group. Adverse outcomes of rate of miscarriage, multiple pregnancies, ectopic pregnancies, OHSS and fetal anomalies were not significantly different between the two intervention groups.
Conclusion:
Letrozole and CC, considered equally patient-friendly agent due to oral route administration. Both agents achieved similar pregnancy rates without any increased risk of adverse events in either group. Letrozole can be used as alternative first-line OI agent to CC in reproductive treatments. Drug selection for patients should be done according to the cost effectiveness, duration of therapy, characteristics and compliance of patients.published_or_final_version
Public Health
Master
Master of Public Health
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Khan, Mohd Azam Khan bin Goriman. "Studies on capacitation and the effects of cooling and low temperature storage on stallion sperm function". Thesis, University of Glasgow, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244254.
Testo completo
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Tamuli, Madan Kumar. "Studies on certain aspects of the development of resistance to cold shock in boar spermatozoa". Thesis, Royal Veterinary College (University of London), 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388535.
Testo completo
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Dalton, Joseph C. "Factors Important to the Efficiency of Artificial Insemination in Single-Ovulating and Superovulated Cattle". Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/27139.
Testo completoAbstract (sommario):
To identify factors important to the efficiency of artificial insemination in cattle, four studies were conducted. In the first study, the addition of cream to the inseminate was used in an attempt to increase accessory sperm number. On d 6 after insemination, 60 embryos were evaluated. The addition of cream to the inseminate had no effect on accessory sperm number. In the second study, cryopreserved semen of a marked bull (spermatozoa exhibiting a semi-flattened anterior head) was matched with semen from an unmarked bull (conventional sperm head shape) to determine competitively the effect of a deep uterine insemination on accessory sperm number. Forty embryos were recovered 6 d after insemination and the ratio of accessory sperm observed was different: 62:38 for unmarked semen in the uterine body and marked semen in the uterine horn, and 72:28 for unmarked semen in the uterine horn and marked semen in the uterine body (P < .05). In the third study, superovulated cows were utilized to determine the effect of artificial insemination time on fertilization status and accessory sperm number. Cows were inseminated once at 0 h (n=10), 12 h (n=10), or 24 h (n=10) after the first standing event. On d 6 after insemination, 529 embryos(ova) were recovered. Fertilization rates were 29% (0 h); 60% (12 h); and 81% (24 h)(P < .01). Percentages of embryos with accessory sperm were: 5 (0 h); 8 (12 h); and 41(24 h) (P < .01). In the fourth study, three experiments utilizing superovulated cows were conducted to provide a basis for distinguishing unfertilized ova from very early embryonic death. In Exp. 1, recovered d 6 unfertilized ova were classified morphologically as either: 1) typical, 2) satellite, or 3) fragmented. In Exp. 2, recovered d 6 unfertilized ova from the third study were classified morphologically, and typical ova were fixed. In Exp. 3, ultrastructural features of preovulatory, tubal-stage, and typical d 6 unfertilized ova were investigated. Preovulatory ova revealed normal ultrastructure; tubal-stage ova exhibited evidence of degeneration; typical d 6 ova were degenerated and contained no discernable organelles. The first three studies support the use of accessory sperm evaluation as an alternative measure of fertility. The final study provides a basis from which future embryologists may distinguish fertilization failure from very early embryonic death.Ph. D.
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Cipriano, Rafael Silva [UNESP]. "Variação na secreção de LH, FSH e no desenvolvimento folicular de novilhas nelore submetidasa protocolos de inseminação artificial em tempo fixo com diferentes concentrações de progesterona". Universidade Estadual Paulista (UNESP), 2007. http://hdl.handle.net/11449/94710.
Testo completoAbstract (sommario):
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cipriano_rs_me_araca.pdf: 1046361 bytes, checksum: 779be3d9a25d3b3245c78549a32c9bf2 (MD5)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Avaliou-se a secreção de LHe FSH de plasmático em novilhasdurantea exposição à diferentes concentrações de progesterona(P4) e após a administração deGnRH ou benzoatodeestradiol (BE). Novenovilhas Nelore, pré-sincronizadas com PgF2a, emintervalo de 12 dias, foram submetidas a 6protocolos comrepetições casualizadas. Os 3 grupos de P4foram: CL (Corpo Lúteo), IMPL+CL (DIB® ecorpo lúteo) e IMPL(DIB®), eapós a remoçãodaP4 estimuladascom GnRH ou BE. Durante a P4, foicoletado sangue a cada12h e nos dias 3, 4 e 5 acada 15 min durante 6 h em 1 animalde cada grupo, depois da retiradados implantes e/ou aplicação de PgF2a, coletas foramrealizadas a cada 3hpor 24 h (BE) ou a cadahora por10h (GnRH) para quantificação de LH e FSH. O exame ultrasonográfico foi realizado a cada 12 he após o términodascoletas de sangue às 24h e 48h. Às 12 h após colocação do implante, o grupo IMPL+CLapresentou menorconcentração de LHque o grupo IMPL,após 36 h os grupos IMPL+C e IMPL apresentaram menorconcentração de LH que o grupo CL e às 60 h o grupo IMPL apresentou menor secreção que o grupo CL. Após 24 h da colocação dos implantes, o grupo IMPL apresentou maior secreção de FSH que os demais grupos, e após 48 e 60 h o grupo IMPL+CL apresentou maior secreção de FSH que o grupo CL. No grupo IMPL, a amplitude máxima do pico de LH foi maior após o GnRH quando comparado com o BE. No grupo CL as novilhas apresentaram menor número de folículos ovarianos e maior diâmetro do maior folículo em relação aos grupos IMPL+CL e IMPL. Quando foi aplicado BE, o grupo IMPL+CL apresentou menor taxa de ovulação com 24 h que os grupos CL e IMPL. Os protocolos de sincronização da ovulação empregados foram...
The LH and FSH secretion and follicle profile was evaluated during expositionto different progesterone (P4) concentration and afterGnRH or estradiol benzoate (BE) administration inNelore heifers. Nine heifers were pré-sinchronized with PGF2a (two injection with 12 days interval) received 6 treatments randomly repeated . There were 3 P4 groups: CL (corpus luteum), IMPL+CL (DIB®and CL) and IMPL (DIB®)that were stimulatedwith GnRH or BE after P4 removal. During P4 blood samples were collected every12 hand on days 3, 4and 5 every 15 minfor 6 hfrom 1 animal per group, after P4 device removal, every 3 hfor 24 h (BE)orevery hour for 10 h(GnRH), for LH and FSH quantification. Ultrasound examination was realizedevery 12 h until the end of blood samples, andthereafter 24 and 48 h. At 12hafter implant insertion the IMPL+CLgroup presented lower LH concentration than IMPL group, after 36 hthe animals with implant presented lower LH concentration than CL group, and after 60h the IMPL group had lower LH secretionthan CL one. On IMPL group,themaximum LH peak amplitude was higher in animalsthat received GnRH comparedto BE. Group with CL presented fewer follicles and higher largest follicle diameterthan IMPL+CLand IMPL. When BE was injected the IMPL+CL group presented lower ovulation rateat 24 h than CL and IMPLgroups. The ovulation synchronization protocols used wereefficient in promoting a preovulatory LH peak in Neloreheifers, independentlyof an associated CL or not to progesterone device. The GnRH treatment induced a higher LH peak amplitude and with an higer efficiency in stimulating ovulation in 24h than BE treatment, in animals with higher progesterone...(Complete abstract, click electronic access below)
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Alves, Aracélle Elisane [UNESP]. "Avaliação da técnica de inseminação artificial intrauterina em fêmeas caninas por videolaparoscopia com sêmen fresco e descongelado". Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/101126.
Testo completoAbstract (sommario):
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alves_ae_dr_jabo.pdf: 382934 bytes, checksum: 26d3285aa222f5838b3d67c55e5d0837 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
O objetivo deste estudo foi avaliar a taxa de concepção em cadelas após inseminação artificial intrauterina por videolaparoscopia. Um total de 20 cadelas foram inseminadas, sendo 10 com sêmen fresco e 10 com sêmen congelado. Os animais se encontravam em estro natural e sob acompanhamento da citologia vaginal. Quando aproximadamente 90% das células se apresentaram cornificadas, foram realizadas dosagens séricas de progesterona afim de se determinar o momento exato da inseminação. Três machos foram utilizados como doadores de sêmen e as coletas foram realizadas por manipulação digital. Após coleta o ejaculados foram analisados quanto ao volume, motilidade, vigor e concentração espermática. Para a inseminações utilizando sêmen fresco, a coleta foi realizada momentos antes do procedimento, e o sêmen acondicionados em banho–maria a 37°C até o momento da inseminação. Amostras destinadas a inseminação com sêmen descongelado, obtiveram mesmo processo de análises após coleta, seguindo para o processo de congelação, permanecendo congeladas por no mínimo uma semana, e então descongeladas momentos antes do procedimento. De acordo com os concentrações séricas de progesterona, as inseminações intrauterinas por videolaparoscopia foram realizadas, sendo cada corno uterino inseminado com 1mL de sêmen, em concentração de 250x106 espermatozóides/mL nas cadelas inseminadas com sêmen fresco e 80x106 espermatozóides/mL naquelas inseminadas com sêmen congelado. Após 7 dias as cadelas foram ováriosalpingohisterectomizadas, sendo o lúmen das tubas e cornos uterinos lavados com solução de PBS. Embriões foram encontrados nos lavados de 7 cadelas inseminadas com sêmen fresco, e em 5 inseminadas com sêmen descongelado. Concluiu-se que o procedimento de inseminação artificial intrauterina...
The objective of this study was to evaluate the fertility in bitches after intrauterine artificial insemination by videolaparoscopy. A total of 20 bitches were inseminated, being 10 with fresh semen and 10 with frozen. The animals were in natural oestrus, and their vaginal cytology was followed. When approximately 90% of the cells were cornificated, evaluation of serum levels of progesterone was performed, with the objective to determinate the exact moment of the artificial insemination. Three males were used as donors, and the samples collection was performed by digital manipulation. After collection the ejaculates were analysed considering volume, motility, vigor and sperm concentration. For the inseminations using fresh semen the collection was performed minutes before the process, and the semen sample was maintained at 37°C. Samples destined to inseminations using frozen semen were submitted to the same analysis process after collection, followed by the freezing process, being frozen during a minimum period of one week, and thawing moments before the procedure. According to the serum levels of progesterone, the intrauterine inseminations by videolaparoscopy were performed, being each uterine corn inseminated with 1 mL of semen, with 250x106 espermatozoa/mL in bitches with fresh semen and 80x106 espermatozoa/mL in bitches with frozen semen. After 7 days the bitches were ovariohysterectomized, and the lumen of the uterine tube and corns were flushed with PBS solution. Embryos were found in 7 bitches inseminated with fresh semen, and in 5 inseminated with frozen semen. It was concluded that the intrauterine artificial insemination by videolaparoscopy seems to be an interesting reproductive biotechnology method, especially in what refers to the use of frozen semen.
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Machado, Marco Antonio. "Efeito do fator de crescimento IGF-I sobre a maturação in vitro de oócitos caninos (Canis familiaris) : avaliação da maturação nuclear e citoplasmática /". Jaboticabal : [s.n.], 2007. http://hdl.handle.net/11449/105950.
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Orientador: Gilson Hélio ToniolloBanca: César Roberto Esper
Banca: Paulo Henrique Franceschini
Banca: Ricardo Toniolli
Banca: Maria Denise Lopes
Resumo: A presente pesquisa foi desenvolvida com o objetivo de avaliar os prováveis efeitos do fator de crescimento semelhante à insulina I (IGF-I) sobre a maturação in vitro (MIV), nuclear e citoplasmática, de oócitos caninos retirados de ovários de cadelas. Os complexos cumulus oócitos (COCs) foram maturados in vitro em meio SOF ("synthetic oviductal fluid"). Foram utilizadas 40 cadelas submetidas ovario-histerectomias para esterilização cirúrgica ou para o tratamento de piometra. As doadoras foram classificadas em grupos conforme raça, faixa etária, condição reprodutiva e fase do ciclo estral. Os COCs (n=1474) foram liberados dos folículos pela técnica de fatiamento dos ovarios e maturados por 72 horas, exceto o grupo M0 (momento zero). O meio de cultivo base, foi o SOF, suplementado ou não com o IGF-I. Foram selecionados apenas COCs classificados como grau 1 para a MIV. Os COCs foram distribuidos em três grupos:: M0 (processados no mesmo dia da colheita da mesma forma que os demais), C (SOF) and E (SOF + IGF-I). Após o período de incubação ou no dia da colheita (M0) os oócitos foram corados para avaliação da maturação nuclear com bis-benzimida (Hoechst 33342) e para a maturação citoplasmática com Lens culinaris. O percentual de COCs/doadora de todas fêmeas foi 35,21% para as fêmeas sem raça definida; 39,69% para adultas (>10 meses); 39,83% para multíparas, e 39,20% para aquelas fêmes em diestro (P<0.05). O percentual de oócitos degenerados foi muito alto tanto na soma total (74.0%) quanto entre os grupos experimentais (M0=59.43; C=75.44; E=80.52%), sendo as diferenças estatisticamente signifcativas (P<0.05). Na maturação nuclear apenas 3,02% de todos os oócitos submetidos a esta avaliação atingiram o estádio de MI (M0=2,83%; C= 4,19%, e E=2,10). Da mesma forma que a retomada meiótica as taxas de maturação citoplasmática foram muito baixas,... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This study was performed to identify the possible effects of insulin-like growth factor-i (IGF-I) on in vitro maturation (IVM) evaluated by nuclear and cytoplasmic of bitch cumulus oocyte complexes (COCs) matured in vitro in synthetic oviductal fluid (SOF) medium. For this purpose ovaries were collected from 40 bitches undergoing ovariohysterectomy for neutering or due to pyometra. The donors females were classified into groups based on breed, age, reproductive status and stage of the estrous cycle. The COCs (n=1474) were released from the follicles by slicing the ovaries and matured in vitro for 72 hours in the base culture medium SOF supplemented or no with IGF-I. Only grade 1 COCs were used for IVM, and were divided into three groups: M0 (zero collection time), C (SOF) and E (SOF + IGF-I). After incubation period, the maturation of the nucleus was examined by staining the oocytes with Hoechst 33342 and the cytoplasmic maturation by means of Lens culinaris agglutinin. The M0 group also was examined to cytoplasmic and nuclear maturation with the same staining dyes. From all females donors were collected 35.21, 39.69, 39.83 and 39.2% COCs per bitch were collected from mongrel, adult (>10 months), multiparous, and diestrus females, respectively (P<0.05). The percentage of degenerated oocytes was very high in the total sum (74.0%) and amongst experimental groups (M0=59.43; C=75.44; E=80.52%) with significant statistical differences (P<0.05) between them. And from all groups only 3.02% oocytes reached MI (M0= 2.83; C=4.19; E=2.10%). Alike nuclear meiotic resumption the cytoplasmic maturation rates were low, 15.83% in the total and 12.90 (M0); 25.58 (C); E (8.69%)...(Complete abstract, click electronic access below)
Doutor
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Grove, Mary Beth. "Optimal time of insemination in dairy cattle identified in estrus by HeatWatch". Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-08292008-063759/.
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Ternus, Eduardo Miotto. "Performance reprodutiva de leitoas submetidas à inseminação artificial pós-cervical". Universidade do Estado de Santa Catarina, 2016. http://tede.udesc.br/handle/handle/2544.
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The objective of this study was to evaluate the reproductive performance of gilts subjected to post-cervical artificial insemination (PCAI) compared to traditional artificial insemination (TAI). We also evaluated the degree of difficulty in bypassing the cervix, time required to perform the insemination, presence of bleeding after insemination, semen backflow, as well as the volume and the total reflow cells 30 minutes after insemination. Gilts submitted to PCAI (n = 279) were inseminated with 45 mL doses of 1.5 x 10⁹ sperm cells and the ones submitted to TAI (n = 273) were inseminated with 80 mL doses with 2.5 x 10⁹ cells. The bypassing of the cervix was possible in 91.04% (254/279) of gilts. The difficulty bypassing the cervix in at least one of the gilt’s PCAI procedures happened with 41.58% (116/279) of the females, but it did not affect reproductive performance (P>0.05). The presence of bleeding after insemination did not affect the farrowing rate and total number of piglets born for both treatments (P>0.05). The average time needed to carry out the PCAI was 1.47 minutes and the TAI was 4.04 minutes. The percentage of sperm present in the reflux was higher in TAI than the PCAI, but no correlation was found between litter size and the percentage of sperm in reflux (P>0.05). There was no statistical difference (P>0.05) in farrowing rate (89.38% and 91.76%) and the total number of piglets born (11.63 and 11.81) between TAI and PCAI treatments, respectively. Thus, it is possible to perform the post-cervical artificial insemination in gilts without causing a reduction in reproductive performance, using doses with a concentration of 1.5 x 10⁹ sperm cells
O objetivo deste trabalho foi avaliar o desempenho reprodutivo de nulíparas submetidas à inseminação artificial pós-cervical (IAPC) comparada à inseminação artificial tradicional (IAT). Foram avaliados a ocorrência de sangramento, refluxo durante à inseminação, dificuldade no transpasse da cérvix, volume e o total de células refluídas até 30 minutos após a inseminação. As fêmeas submetidas à IAPC (n=279) foram inseminadas com doses na concentração de 1,5 x 109 diluídos em 45 mL e as fêmeas submetidas à IAT (n=273) foram inseminadas com doses na concentração de 2,5 x 109 diluídos em 80 mL. O transpasse da cérvix foi possível em 91,04% (254/279) das leitoas. A dificuldade no transpasse da cérvix, em pelo menos uma das inseminações, foi de 41,58% (116/279) e não comprometeu o desempenho reprodutivo (P>0,05). A presença de sangramento durante a inseminação não afetou a taxa de parto nem o número de leitões nascidos totais para ambos os tratamentos (P>0,05). O tempo médio necessário para a realização da IAPC foi de 1,47 minutos e a IAT foi de 4,04 minutos. O percentual de espermatozoides presentes no refluxo foi maior na IAT do que na IAPC, não sendo observada diferença no tamanho de leitegada de acordo com o percentual de espermatozoides no refluxo (P>0,05). Não houve diferença estatística (P>0,05) taxa de parto (89,38% e 91,76%) e no número de leitões nascidos totais (11,63 e 11,81) entre os tratamentos IAT e IAPC, respectivamente. Desta forma, podemos concluir que pode - se realizar a inseminação artificial pós-cervical em leitoas sem causar redução no desempenho reprodutivo, utilizando doses com concentração de 1,5 x 109 células espermáticas
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Strickler, Tara Leigh. "Improving Assisted Reproductive Technologies in the Endangered Black-Footed Ferret: Artificial Insemination and Sperm Cryopreservation". The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1267057806.
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Carmona, Julieta Maria Peixoto. "Resposta inflamatória uterina em éguas submetidas a inseminação artificial". Master's thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2011. http://hdl.handle.net/10400.5/3608.
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Dissertação de Mestrado Integrado em Medicina VeterináriaA inseminação artificial de éguas resulta invariavelmente numa resposta inflamatória uterina transitória e fisiológica cuja função é eliminar o excesso de espermatozóides, plasma seminal, diluidores e microrganismos do lúmen uterino. Esta inflamação é caracterizada por um influxo de polimorfonucleares neutrófilos (PMNs) para o lúmen uterino. A sua presença e magnitude pode ser diagnosticada através de ecografia uterina transrectal em combinação com citologia, cultura e/ou biópsia endometrial. São vários os intervenientes neste fenómeno. Os espermatozóides equinos activam o complemento, incitando a quimiotaxia e migração de PMNs para o lúmen uterino. Maiores concentrações espermáticas correspondem a um estímulo quimiotático mais exuberante. O plasma seminal aparenta possuir tanto a capacidade de suprimir (in vitro) como de estimular (in vivo) a migração dos PMNs. A sua presença numa dose inseminante reduz a duração da resposta inflamatória uterina após inseminação artificial (IA). Já o papel dos diluidores é ainda desconhecido, mas a sua infusão simples é passível de resultar numa inflamação uterina. Estudos recentes sugerem que a inseminação de doses com 80 mL (volume médio do ejaculado de garanhão) resultam numa maior inflamação uterina. Contrariamente ao postulado, o sémen congelado por si só, não induz uma maior inflamação que sémen fresco e, aparentemente, a resposta inflamatória uterina obtida após monta natural e IA com sémen fresco ou refrigerado diluído não difere. Não existem também evidências de que a IA intra-cornual profunda cause um maior estímulo inflamatório quando comparada com a IA clássica no corpo uterino ou que o momento da IA influencie a resposta inflamatória uterina por ela despoletada. O objectivo desta dissertação consistiu em estudar a influência de diversos factores (idade da égua, tipo de sémen, presença de plasma seminal, momento e técnica de IA, e características do útero antes da inseminação, nomeadamente o edema uterino) no estabelecimento da resposta inflamatória uterina após inseminação bem como a sua influência na taxa de concepção. Para tal foram avaliadas 27 éguas (n=27) recorrendo-se à ecografia uterina antes e 24 horas após IA, momento em que se recolheram líquidos de lavagem uterina para citologia. Neste estudo não foram obtidos resultados estatisticamente significativos que permitam aferir a influência dos parâmetros atrás referidos na inflamação uterina após IA (p>0,05) principalmente por este estudo estar condicionado pelo tamanho reduzido da amostra analisada.
ABSTRACT - Artificial insemination of mares always results in a transient physiological uterine inflammatory response which main function is to remove spermatozoa in excess, seminal plasma, extenders and microorganisms present in the uterine lumen. This inflammation is characterized by an influx of neutrophil polymorphonuclears (PMNs) to the uterine lumen. Its presence and magnitude can be diagnosed by transrectal ultrasonography in combination with uterine cytology, culture and/or endometrial biopsy. There are several players in this phenomenon. The equine spermatozoa activate complement, which results in chemotaxis and migration of PMNs into the uterine lumen. Higher sperm concentrations correspond to a more exuberant chemotactic stimulus. Seminal plasma appears to have both the ability to suppress (in vitro) and to stimulate (in vivo) the migration of PMNs. Its presence in an insemination dose reduces the duration of uterine inflammatory response after artificial insemination (AI). The role of semen extenders is still unknown but its single infusion is likely to result in an inflammation of the uterus. Recent studies suggest that insemination doses of 80 mL (average volume of the stallion ejaculate) result in a greater inflammation. Contrary to assumption, frozen semen itself doesn’t induce a greater inflammation than fresh semen, and apparently there is no difference between the inflammatory response elicited by natural mating as compared to AI with fresh or chilled diluted semen. There is also no evidence that deep horn AI causes a greater inflammatory stimulus compared with the classical AI in the uterine body, or that the time of AI influences the uterine inflammatory response. The aim of this dissertation was to study the influence of various factors (age of the mare, type of semen, presence of seminal plasma, AI time and technique, and uterine characteristics before insemination, namely the uterine edema) in the establishment and extent of uterine inflammatory response after insemination and its influence on the conception rates. For that, 27 mares (n=27) were evaluated by resorting to uterine ultrasound before and 24 hours after AI, moment when uterine lavage samples were collected for uterine cytology. This study didn’t yield any significant differences for all parameters evaluated that would allow the assessment of the influence of these parameters in uterine inflammation after AI (p> 0.05) as this study was mainly conditioned by the small size of the sample.
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Martins, Thiago [UNESP]. "Efeitos das concentrações de progesterona, duração do proestro e diâmetro folicular sobre a taxa de concepção de novilhas Nelore submetidas à inseminação artificial após detecção do estro ou inseminadas em tempo fixo". Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/96653.
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martins_t_me_botfmvz.pdf: 1373980 bytes, checksum: f2c744fca36213ab387227a01d3d9dc0 (MD5)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Universidade Estadual Paulista (UNESP)
O objetivo desse estudo foi avaliar o efeito das concentrações de progesterona no desenvolvimento folicular e a influência do diâmetro folicular e duração do proestro na concepção de novilhas púberes inseminadas após detecção de cio ou submetidas à IATF. No exp.1, 723 novilhas foram sincronizadas com o protocolo: D0: benzoato de estradiol (BE, 2,0 mg, Estrogin®) + CIDR®; D7: dinoprost trometamina (PGF2a, 12,5 mg, Lutalyse ). As novilhas foram distribuídas aleatoriamente no dia 0 para inserção de CIDR® sem utilização prévia (CIDR1) ou utilizado previamente por 18 dias (CIDR3) e retirada no dia 7 ou dia 9 seguido de detecção de cio e inseminação 12h após o cio. No exp.2, 1083 novilhas foram sincronizadas de acordo com o exp1, entretanto todos dispositivos foram removidos no dia 9 e os animais foram inseminados 48 h (0,5 mg, i.m., ECP® no dia 9), 54 ou 72 h (100 μg, im., Fertagyl® no dia da IATF). No exp.3 474 novilhas foram distribuídas aleatoriamente para receberem: D-1: 2mg de BE no grupo 3; D0: 1 e 2 mg de BE respectivamente nos grupos 1 e 2. Todas novilhas foram sincronizadas com CIDR1, receberam 12,5 mg de PGF2a no dia 7 e 0,5 mg de ECP no dia 9. No grupo 2 foi aplicado 200 UI de eCG no dia 9. As novilhas foram inseminadas 48 horas após a remoção do dispositivo, perfazendo assim 3 grupos experimentais: grupo 1 (1 mg de BE no D0), grupo 2 (200 UI de eCG no D9) e grupo 3 (CIDR por 10 dias). Nos exp.1 e 2 o diâmetro do maior folículo (ØFD) e amostras de sangue (P4) foram obtidas em um subgrupo de animais no dia 7 e dia 9. No dia da IA e IATF foi feita avaliação do ØFD em um subgrupo de animais no exp.3 e em todos animais no exp1 e 2. Amostras de sangue para dosagem de P4 foram colhidas 7 dias após a IA ou IATF em um subgrupo de animais do exp.1 e em todos animais nos...
The aim of this trial was to evaluate the effect of progesterone concentration in follicular development and influence of follicular diameter and length of proestrus in the conception rate of pos pubertal heifers inseminated after detection of estrus or submitted to TAI. In exp.1, 723 heifers were synchronized with the protocol: D0: estradiol benzoate (EB, 2.0 mg, Estrogin®) + CIDR®; D7: dinoprost trometamina (PGF2a, 12.5 mg, Lutalyse ). The heifers were randomly assigned on D0 for inserting CIDR® without prior use (CIDR1) or previously used for 18 days (CIDR3) and were withdraw on day 7 or day 9 followed by heat detection and insemination 12 hours after estrus. In exp.2, 1083 heifers were synchronized according to exp1, however all devices were removed in day 9 and the animals were inseminated 48h (0.5 mg, i.m., ECP® on day 9), 54 ou 72 h (100 μg, im., Fertagyl® on day TAI). In exp.3, 474 heifers were randomly assigned to receive: D-1: 2 mg of EB in group 3; D0: 1 and 2 mg of EB respectively in groups 1 and 2. All heifers were synchronized with CIDR1, received 12.5 mg of PGF2a on day 7 and 0.5 mg of ECP on day 9. In the group 2 was administered 200 UI of eCG on day 9. The heifers were inseminated 48 hours after device removal, so three experimental groups were formed: group 1 (1 mg of EB on D0), group 2 (200 UI of eCG on D9) and group 3 (CIDR for 10 days). In the exp.1 and 2 the diameter of the largest follicle (ØFD) and sample of blood (P4) were obtained of subset of animals on day 7 and day 9. On days of AI and TAI the diameter of the largest follicle (ØFD) was measured in the subset of animals in the exp.3 and all animals in the exp.1 and exp.2. Blood samples for P4 assays were harvested seven days after AI or TAI in subset of animals the exp.1 and all heifers the exp.2 and exp.3. Pregnancy diagnosis was... (Complete abstract click electronic access below)
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Ignácio, Fernanda Saules [UNESP]. "Avaliação funcional de estruturas luteais formadas após aspiração folicular em éguas". Universidade Estadual Paulista (UNESP), 2013. http://hdl.handle.net/11449/105903.
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ignacio_fs_dr_botfmvz.pdf: 780944 bytes, checksum: 399ca6536c4a5a4c454f0633b28c2768 (MD5)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Um grande fator limitante dos programas de transferência de embrião é o número de receptoras disponíveis durante a estação de monta. A aspiração de folículos ≥25mm promove a formação de uma estrutura lútea capaz de produzir progesterona em concentrações semelhantes ao diestro (>2ng/ml). O objetivo do presente trabalho foi avaliar a formação lútea de folículos ≥25mm aspirados, o útero e a taxa de prenhez destes animais após a inovulação. As éguas foram distribuídas aleatoriamente em três grupos: grupo controle (indução da ovulação com 2500 UI de hCG), grupo aspiração (aspiração do folículo ≥25mm) e hCG+aspiração (aplicação de 2500 UI de hCG 24h antes da aspiração de folículo ≥25mm). Cada égua foi acompanhada ultrassonograficamente para detecção da ovulação, aplicação de 7,5mg de PGF2α cinco dias após a ovulação para indução da luteólise e para determinação do momento da aspiração. O experimento foi dividido em: fase 1 – dosagens de progesterona intrafoliculares e plasmáticas e avaliação ultrassonográfica por modo B e Power Doppler das estruturas lúteas e útero; fase 2 – teste de fertilidade. As concentrações de P4 intrafoliculares foram maiores para os folículos aspirados com diâmetros maiores e a aplicação prévia do hCG aumentou estas nos folículos entre 25-29mm, bem como, a resposta ao tratamento. A aspiração folicular promoveu aumento nas concentrações de P4 plasmáticas a concentrações semelhantes ao diestro (≥2ng/mL), no entanto, as estruturas formadas a partir da aspiração apresentam luteinização mais lenta. O aumento da P4 plasmática foi capaz de promover alterações uterinas semelhantes ao diestro espontâneo e taxa de 43% de prenhez foi atingida com as éguas aspiradas. Conclui-se que a aspiração de folículos ≥25mm pode ser uma opção para...
The major limiting factor of embryo transfer programs is the number of available recipient mares during the breeding season. The aspiration of follicles ≥25 mm leads to the formation of a structure capable of producing progesterone at concentrations similar to diestrus (> 2ng/ml). The present work aims to evaluate the luteal structure from ablation of follicles ≥25mm, uterine conditions and pregnancy rates after embryo transfer. Mares were randomly assigned into three groups: control group (ovulation induction with 2500 IU hCG), ablation group (follicle ≥25mm ablation) and hCG + ablation (2500 IU of hCG injection 24h before ablation of follicle ≥25mm ). Each mare was monitored by ultrasound for detection of ovulation and the determination of the time of ablation. A 7.5 mg dose of PGF2α was administered five days post ovulation to induce luteolysis. The experiment was divided into: phase 1 - intrafollicular plasma progesterone measurement and ultrasound evaluation by B-mode and power Doppler of luteal structures and uterus; phase 2 - fertility test. Concentrations of intrafollicular P4 were greater for larger follicles and hCG was efficient on increasing these levels on follicles 25-29mm, as well as increasing its response to treatment. Follicular ablation induced an increase in P4 plasma concentrations to values similar to diestrus (≥ 2ng/ml), however, the formed structures showed a delay on the luteinisation process. The increase in plasma P4 was able also to promote changes in the uterus that were similar to diestrous and these mares showed a 43% pregnancy rate. In conclusion, ablation of follicles ≥25mm can be an option for programs with limited number of recipients, however, more studies are still needed to explain ... (Complete abstract click electronic access below)
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Novaes, Filho Luiz Fernando [UNESP]. "Resposta luteal à PGF2α (Dinoprost Trometamina) durante as fases de luteogênese e manutenção do corpo lúteo em éguas". Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/110625.
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000784153.pdf: 1615325 bytes, checksum: f1698e7c84f8e1f9d5d79d9ac9a019c3 (MD5)Estudos recentes têm demonstrado diferentes respostas do CL quando da administração de prostaglandina F2α em diferentes doses e momentos. O objetivo deste trabalho foi avaliar o efeito do tratamento com baixas doses de PGF2α sobre características funcionais e estruturais de CLs em fases distintas do diestro em éguas. As éguas foram distribuídas aleatoriamente em 8 grupos: D2-NaCL (n=6; 2 mL de solução de NaCl à 0,9%); D2-Pgf (n=9; 10 mg de Dinoprost Trometamina); D2-1/10Pgf (n=6; 1 mg de Dinoprost Trometamina); D2-1/20Pgf (n=6; 0,5 mg de Dinoprost Trometamina); D8-NaCl (n=7; 2 mL de solução de NaCl à 0,9%); D8-Pgf (n=6; 10 mg de Dinoprost Trometamina); D8-1/10Pgf (n=7; 1mg Dinoprost Trometamina); D8-1/20Pgf (n=7; 0,5 mg de Dinoprost Trometamina). A área total do CL (AT), a perfusão sanguínea objetiva (PVO) e subjetiva (PVS) do CL e as concentrações plasmáticas de progesterona (P4) foram avaliados a cada 6 horas durante 48 horas (H0 = momento imediatamente antes do tratamento). A AT não sofreu interferência da dose de PGF2α independente do dia de tratamento. A P4 apresentou uma correlação positiva com a PVO e PVS, sendo esta última mais sensível na detecção das alterações de P4. O tratamento no D2 não foi capaz de induzir a luteólise completa em nenhuma égua enquanto que o tratamento no D8 promoveu luteólise completa em todas as éguas do grupo controle positivo e parcial e completa em algumas éguas dos grupos D8-1/10Pgf e D8-1/20Pgf. Resposta dose-dependente da PGF2α foi observada, ou seja, quanto menor a dose aplicada menor as quedas em PVS e P4. Conclui-se que a resposta do CL ao tratamento com diferentes doses de PGF2α depende da fase de desenvolvimento do CL
Recent studies have demonstrated different response of the CL to different doses of prostaglandin F2α on differente moments. The present experiment aims to evaluate the effect of treatments with PGF2α low doses over functional e structural characteristics of the CLs at two distintic stages. Mares were randomly assigned into groups: D2-NaCL (n=6; 2 mL of saline solution); D2-Pgf (n=9; 10 mg of Dinoprost Tromethamine); D2-1/10Pgf (n=6; 1 mg of Dinoprost Tromethamine); D2-1/20Pgf (n=6; 0,5 mg of Dinoprost Tromethamine); D8-NaCl (n=7; 2 mL of saline solution; D8-Pgf (n=6; 10 mg of Dinoprost Tromethamine); D8-1/10Pgf (n=7; 1mg of Dinoprost Tromethamine); D8-1/20Pgf (n=7; 0,5 mg of Dinoprost Tromethamine). Total area (AT), objective (PVO) and subjective (PVS) vascular perfusion of the CL and plasmatic progesterone (P4) were evaluated every six hours for 48h after treatment (H0 = immediately before treatment). PGF2α did not influenced on AT or day of treatment. P4 showed a positive correlation to PVO and PVS, and PVS was strongly correlated to P4. Treatment on D2 was not able to induce total luteolysis in any mare while treatment on D8 promoted total luteolysis in all mares in group D8-Pgf and 29% and 14% of the mares for the groups D8-1/10Pgf and D8-1/20Pgf, respectively. Parical luteolysis were also detected in groups on D8. The response to PGF2α seems to be dose-dependent, the decrease in PGF2α dose proportionally decreases PVS and P4. It is concluded that CL response to treatment with different doses of PGF2α depends os the CL developmental stage
44
Peres, Kenya Costa [UNESP]. "Transporte placentário via cavéola na placenta de bovinos clonados e transgênicos". Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/115903.
Testo completoAbstract (sommario):
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000809964.pdf: 1108463 bytes, checksum: 43fa89dc624ca99b382ecaa200b42518 (MD5)A utilização da transgenia com a proteína fluorescente verde (GFP) como marcador de células de origem fetal nas placentas de clones bovinos servirá de modelo inédito para estudo morfofisiológico e imunológico da interação materno-fetal, visto que possibilitará o seu mapeamento, diferenciando as células fetais das maternas. Tal modelo terá aplicação direta, principalmente porque estes são animais que apresentam problemas em relação ao seu desenvolvimento. Com o auxílio deste modelo, pretende- se verificar o transporte de substâncias entre a mãe e o feto via endocitose, pela imunolocalização das proteínas chamadas de caveolinas. Para tanto foram utilizados 06 bovinos clonados e 30 bovinos de inseminação artificial (IA) com idade até 90 dias de gestação, os quais tiveram seu desenvolvimento interrompido mediante abate humanitário das receptoras e ovariosalpingohisterectomia, com posterior recuperação do útero gestante. Foram coletados os placentônios e o cório. Uma parte das amostras foi recortada e fixada, por imersão, em solução de parafolmaldeído a 4% ou formoldeído a 10% em tampão fosfato de sódio (PBS) a 0,1M pH 7.4, solução de Zamboni (4% de paraformoldeído, 15% de ácido pícrico, em tampão fosfato de sódio a 0,1M pH 7.4), metacarn (60% de metanol, 30% de clorofórmio, e 10% de ácido acético glacial), para verificação da morfologia e realização de imuno-histoquímica para as proteínas caveolinas -1 e -2 (CAV -1 e CAV-2). As caveolinas -1 foram localizadas nos vilos fetais e maternos, mas sua marcação mais forte foi observada no estroma endometrial. As caveolinas -2 tiveram marcação positiva no trofoblasto e membrana corioalantoide, e, especificamente em célula trofoblástica gigante binucleada. Sendo assim, os resultados mostram que a proteína CAV-1 teve uma maior expressão em relação a proteína CAV-2 e que as proteínas CAV-1 e -2 são parte da composição das cavéolas, sendo .
The transgenic application of green fluorecent protein (GFP) as fetal cell marker on cattle cloned placenta could provide an exclusive model for studying the morphologic and immunologic maternal-fetal interactions, providing information about its mapping, distinguishing the fetal from maternal cells. This model will have direct application, mainly because these are animals that present problems during its development. With this model's support, we intend to verify the substances transport between mother and fetus during endocytocis, through the immunolocalization of protein named caveolae. For these, we used 06 cloned bovine and 30 cattle samples of artificial insemination (AI) with 90 days of pregnancy, which had been their development interrupted by humanitarian slaughter of the recipient and recovery of the pregnant uterus. We collected the placentome and the chorion. A part of the samples will be cutted and fixed, by immersion, on a solution containing 4% of parafomaldehyde or 10% of formaldehyde on a sodium phosphate buffer (PBS) at 0,1M pH 7.4, Zamboni solution (4% of paraformaldehyde, 15% of picric acid, on sodium phosphate buffer 0,1M pH 7.4), metacarn (60% of metanol, 30% of chloroform, and 10% glacial acetic acid), for morphologic and immunohistochemistry verification for caveolinas proteins -1 and -2 ( -1 CAV and CAV- 2). The caveolinas -1 were found in fetal and maternal villi , but its strongest staining was observed in the endometrial stroma . The caveolinas -2 had positive staining in trophoblast and chorioallantoic membrane , and specifically in giant trophoblastic binucleated cell . therefore the results were compared between cloned cattle and from AI or natural mating, for assisting on detection of the reason of many placental alterations, embryonic losses, spontaneous abortion, post-natal mortality and large offspring syndrome on laboratory-manipulated animals. The result suggests that the proteins caveolins -1 and ...
45
Albuquerque, João Pedro de [UNESP]. "Estratégias para aumento da concentração de progesterona durante o desenvolvimento do folículo ovulatório em vacas holandesas em lactação submetidas à inseminação artificial em tempo fixo". Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/136114.
Testo completoAbstract (sommario):
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000858937.pdf: 237984 bytes, checksum: 61c941e361051e9de4cce1254082d23f (MD5)O presente estudo avaliou se a concentração de P4 durante o desenvolvimento do folículo ovulatório em protocolo a base de P4/BE e com uma aplicação de GnRH em seu início interfere na prenhez à IATF em vacas Holandesas em lactação. A hipótese é que vacas com maior P4 no dia da aplicação da 1ª dose de PGF2α terão maior fertilidade. Para alterar a P4 os animais (n=594) foram distribuídos aleatoriamente em dois grupos para receberem um ou dois dispositivos intravaginais de P4 (CIDR®, Zoetis, SP, Brasil). O protocolo utilizado foi: no d-11 inserção de 1 CIDR (novo ou previamente usado por 9 dias) + aplicação de 2mg i.m. de BE (Gonadiol®, Zoetis, SP, Brasil) + 100mcg i.m. de GnRH (Cystorelin®, Merial, SP, Brasil); d-4, aplicação de 25mg i.m. de Dinoprost (Lutalyse®, Zoetis, SP, Brasil); d-2, aplicação de 25mg i.m. de Dinoprost + 1mg i.m. de ECP (ECP®, Zoetis, SP, Brasil) + retirada do dispositivo de P4; d0, IATF. Os animais do grupo 2CIDR receberam um CIDR adicional no d-11, o qual foi retirado no d-4. Nos d-11 (n= 117), d-4 (n= 351), d0 (n= 214) e d10 (n= 72) foram colhidas amostras de sangue para determinação da concentração de P4. A P/IA foi determinada através de US nos d32 (DG1) e d60 (DG2). Dados binários foram analisados pelo PROC GLIMMIX, e os dados contínuos pelo PROC MIXED do SAS (foi considerada diferença significativa se P<0,05 e tendência se P<0,1). A P4 não diferiu entre os tratamentos no d-11 (1CIDR= 4,2±0,4 ng/ml; 2CIDR= 4,5± 0,4ng/ml; P>0,1), e no d-4 (1CIDR= 3,5±0,2ng/ml; 2CIDR= 3,8±0,2 ng/ml; P>0,1), porém foi detectada interação entre tratamento e presença de CL no início do protocolo na P4 no d-4 (sem presença de CL e 1CIDR= 2,7±0,3ng/ml; 2CIDR= 3,6±0,3ng/ml, com presença de CL e 1CIDR= 4,3±0,3ng/ml; 2CIDR= 4,0±0,3ng/ml; P<0,05). Não houve diferença na prenhez a IATF e nas perdas gestacionais entre os tratamentos [DG1: 1CIDR= 20,0 ...
The present study evaluated if P4 concentration during ovulatory follicle development in a timed artificial insemination (TAI) protocol based on P4/E2 affects pregnancy per AI in lactating Holstein cows. Our hypothesis is that cows that present higher P4 concentration at PGF2α administration have also higher fertility. To alter P4, animals (n=594) were randomly assigned to receive one or two intravaginals devices of P4 (CIDR®, Zoetis, SP, Brazil). TAI protocol utilized was: d-11 intravaginal device of P4 (new or previously used by 9 days) + 2mg im EB (Gonadiol®, Zoetis, SP, Brazil) + 100mcg im GnRH (Cystorelin®, Merial, SP, Brazil); d-4, 25mg im Dinoprost (Lutalyse®, Zoetis, SP, Brazil); d-2, 25mg im Dinoprost + 1mg im ECP (ECP®, Zoetis, SP, Brazil) + CIDR removal; d0, TAI. Animals in the group 2CIDR received an adicional CIDR at d-11, which was removed at d-4. At d-11 (n=117), d-4 (n=351), d0 (n=214) and d10 (n=72), blood samples were taken from cows for P4 concentration measurements. Pregnancy per AI was determined by ultrasound at d32 (DG1) and d60 (DG2). The binomial data were analyzed using PROC GLIMMIX and continuous data using PROC MIXED of SAS. An effect was considered significant when P<0.05 and tendency when P<0.1. P4 did not differ among treatments at d-11 (1CIDR=4.2±0.4ng/ml; 2CIDR=4.5±0.4ng/ml; P>0.1), and at d-4 (1CIDR=3.5±0.2ng/ml; 2CIDR=3.8±0.2 ng/ml; P>0.1). An interaction was detected between treatment and CL presence at the beginning of TAI protocol in P4 at d-4 (without CL and 1CIDR=2.7±0.3ng/ml; 2CIDR= 3.6±0.3ng/ml, with CL and 1CIDR=4.3±0.3ng/ml; 2CIDR= 4.0±0.3ng/ml; P<0.05). There was no difference among treatments in pregnancy per AI and pregnancy loss between DG1 and DG2 [DG1: 1CIDR= 20,0% (81/310) vs. 2CIDR= 15,7% (65/284); DG2: 1CIDR= 18,2% (74/310) vs. 2CIDR= 13,8% (57/283); Pregnancy loss: 1CIDR= 14,1% (7/81) vs. 2CIDR= 11,5% (7/64); P>0,1]. 37,0% (28/63)...
46
Ignácio, Fernanda Saules. "Avaliação funcional de estruturas luteais formadas após aspiração folicular em éguas /". Botucatu : [s.n.], 2013. http://hdl.handle.net/11449/105903.
Testo completoAbstract (sommario):
Orientador: Cezinande de MeiraBanca: Luciano Andrade Silva
Banca: Cássia Maria Barroso Orlandi
Banca: Fernanda da Cruz Landim e Alvarenga
Banca: Sony Dimas Bicudo
Resumo: Um grande fator limitante dos programas de transferência de embrião é o número de receptoras disponíveis durante a estação de monta. A aspiração de folículos ≥25mm promove a formação de uma estrutura lútea capaz de produzir progesterona em concentrações semelhantes ao diestro (>2ng/ml). O objetivo do presente trabalho foi avaliar a formação lútea de folículos ≥25mm aspirados, o útero e a taxa de prenhez destes animais após a inovulação. As éguas foram distribuídas aleatoriamente em três grupos: grupo controle (indução da ovulação com 2500 UI de hCG), grupo aspiração (aspiração do folículo ≥25mm) e hCG+aspiração (aplicação de 2500 UI de hCG 24h antes da aspiração de folículo ≥25mm). Cada égua foi acompanhada ultrassonograficamente para detecção da ovulação, aplicação de 7,5mg de PGF2α cinco dias após a ovulação para indução da luteólise e para determinação do momento da aspiração. O experimento foi dividido em: fase 1 - dosagens de progesterona intrafoliculares e plasmáticas e avaliação ultrassonográfica por modo B e Power Doppler das estruturas lúteas e útero; fase 2 - teste de fertilidade. As concentrações de P4 intrafoliculares foram maiores para os folículos aspirados com diâmetros maiores e a aplicação prévia do hCG aumentou estas nos folículos entre 25-29mm, bem como, a resposta ao tratamento. A aspiração folicular promoveu aumento nas concentrações de P4 plasmáticas a concentrações semelhantes ao diestro (≥2ng/mL), no entanto, as estruturas formadas a partir da aspiração apresentam luteinização mais lenta. O aumento da P4 plasmática foi capaz de promover alterações uterinas semelhantes ao diestro espontâneo e taxa de 43% de prenhez foi atingida com as éguas aspiradas. Conclui-se que a aspiração de folículos ≥25mm pode ser uma opção para... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The major limiting factor of embryo transfer programs is the number of available recipient mares during the breeding season. The aspiration of follicles ≥25 mm leads to the formation of a structure capable of producing progesterone at concentrations similar to diestrus (> 2ng/ml). The present work aims to evaluate the luteal structure from ablation of follicles ≥25mm, uterine conditions and pregnancy rates after embryo transfer. Mares were randomly assigned into three groups: control group (ovulation induction with 2500 IU hCG), ablation group (follicle ≥25mm ablation) and hCG + ablation (2500 IU of hCG injection 24h before ablation of follicle ≥25mm ). Each mare was monitored by ultrasound for detection of ovulation and the determination of the time of ablation. A 7.5 mg dose of PGF2α was administered five days post ovulation to induce luteolysis. The experiment was divided into: phase 1 - intrafollicular plasma progesterone measurement and ultrasound evaluation by B-mode and power Doppler of luteal structures and uterus; phase 2 - fertility test. Concentrations of intrafollicular P4 were greater for larger follicles and hCG was efficient on increasing these levels on follicles 25-29mm, as well as increasing its response to treatment. Follicular ablation induced an increase in P4 plasma concentrations to values similar to diestrus (≥ 2ng/ml), however, the formed structures showed a delay on the luteinisation process. The increase in plasma P4 was able also to promote changes in the uterus that were similar to diestrous and these mares showed a 43% pregnancy rate. In conclusion, ablation of follicles ≥25mm can be an option for programs with limited number of recipients, however, more studies are still needed to explain ... (Complete abstract click electronic access below)
Doutor
47
Peres, Kenya Costa. "Transporte placentário via cavéola na placenta de bovinos clonados e transgênicos/". Dracena, 2014. http://hdl.handle.net/11449/115903.
Testo completoAbstract (sommario):
Orientador: Flavia Thomaz Verechia PereiraBanca: Cristiana Andrighetto
Banca: Vanessa Gomes Ueno
Resumo: A utilização da transgenia com a proteína fluorescente verde (GFP) como marcador de células de origem fetal nas placentas de clones bovinos servirá de modelo inédito para estudo morfofisiológico e imunológico da interação materno-fetal, visto que possibilitará o seu mapeamento, diferenciando as células fetais das maternas. Tal modelo terá aplicação direta, principalmente porque estes são animais que apresentam problemas em relação ao seu desenvolvimento. Com o auxílio deste modelo, pretende- se verificar o transporte de substâncias entre a mãe e o feto via endocitose, pela imunolocalização das proteínas chamadas de caveolinas. Para tanto foram utilizados 06 bovinos clonados e 30 bovinos de inseminação artificial (IA) com idade até 90 dias de gestação, os quais tiveram seu desenvolvimento interrompido mediante abate humanitário das receptoras e ovariosalpingohisterectomia, com posterior recuperação do útero gestante. Foram coletados os placentônios e o cório. Uma parte das amostras foi recortada e fixada, por imersão, em solução de parafolmaldeído a 4% ou formoldeído a 10% em tampão fosfato de sódio (PBS) a 0,1M pH 7.4, solução de Zamboni (4% de paraformoldeído, 15% de ácido pícrico, em tampão fosfato de sódio a 0,1M pH 7.4), metacarn (60% de metanol, 30% de clorofórmio, e 10% de ácido acético glacial), para verificação da morfologia e realização de imuno-histoquímica para as proteínas caveolinas -1 e -2 (CAV -1 e CAV-2). As caveolinas -1 foram localizadas nos vilos fetais e maternos, mas sua marcação mais forte foi observada no estroma endometrial. As caveolinas -2 tiveram marcação positiva no trofoblasto e membrana corioalantoide, e, especificamente em célula trofoblástica gigante binucleada. Sendo assim, os resultados mostram que a proteína CAV-1 teve uma maior expressão em relação a proteína CAV-2 e que as proteínas CAV-1 e -2 são parte da composição das cavéolas, sendo .
Abstract: The transgenic application of green fluorecent protein (GFP) as fetal cell marker on cattle cloned placenta could provide an exclusive model for studying the morphologic and immunologic maternal-fetal interactions, providing information about its mapping, distinguishing the fetal from maternal cells. This model will have direct application, mainly because these are animals that present problems during its development. With this model's support, we intend to verify the substances transport between mother and fetus during endocytocis, through the immunolocalization of protein named caveolae. For these, we used 06 cloned bovine and 30 cattle samples of artificial insemination (AI) with 90 days of pregnancy, which had been their development interrupted by humanitarian slaughter of the recipient and recovery of the pregnant uterus. We collected the placentome and the chorion. A part of the samples will be cutted and fixed, by immersion, on a solution containing 4% of parafomaldehyde or 10% of formaldehyde on a sodium phosphate buffer (PBS) at 0,1M pH 7.4, Zamboni solution (4% of paraformaldehyde, 15% of picric acid, on sodium phosphate buffer 0,1M pH 7.4), metacarn (60% of metanol, 30% of chloroform, and 10% glacial acetic acid), for morphologic and immunohistochemistry verification for caveolinas proteins -1 and -2 ( -1 CAV and CAV- 2). The caveolinas -1 were found in fetal and maternal villi , but its strongest staining was observed in the endometrial stroma . The caveolinas -2 had positive staining in trophoblast and chorioallantoic membrane , and specifically in giant trophoblastic binucleated cell . therefore the results were compared between cloned cattle and from AI or natural mating, for assisting on detection of the reason of many placental alterations, embryonic losses, spontaneous abortion, post-natal mortality and large offspring syndrome on laboratory-manipulated animals. The result suggests that the proteins caveolins -1 and ...
Mestre
48
Albuquerque, João Pedro de. "Estratégias para aumento da concentração de progesterona durante o desenvolvimento do folículo ovulatório em vacas holandesas em lactação submetidas à inseminação artificial em tempo fixo /". Botucatu, 2015. http://hdl.handle.net/11449/136114.
Testo completoAbstract (sommario):
Orientador: José Luiz Moraes VasconcelosBanca: João Carlos Pinheiro Ferreira
Banca: Mario Binelli
Resumo: O presente estudo avaliou se a concentração de P4 durante o desenvolvimento do folículo ovulatório em protocolo a base de P4/BE e com uma aplicação de GnRH em seu início interfere na prenhez à IATF em vacas Holandesas em lactação. A hipótese é que vacas com maior P4 no dia da aplicação da 1ª dose de PGF2α terão maior fertilidade. Para alterar a P4 os animais (n=594) foram distribuídos aleatoriamente em dois grupos para receberem um ou dois dispositivos intravaginais de P4 (CIDR®, Zoetis, SP, Brasil). O protocolo utilizado foi: no d-11 inserção de 1 CIDR (novo ou previamente usado por 9 dias) + aplicação de 2mg i.m. de BE (Gonadiol®, Zoetis, SP, Brasil) + 100mcg i.m. de GnRH (Cystorelin®, Merial, SP, Brasil); d-4, aplicação de 25mg i.m. de Dinoprost (Lutalyse®, Zoetis, SP, Brasil); d-2, aplicação de 25mg i.m. de Dinoprost + 1mg i.m. de ECP (ECP®, Zoetis, SP, Brasil) + retirada do dispositivo de P4; d0, IATF. Os animais do grupo 2CIDR receberam um CIDR adicional no d-11, o qual foi retirado no d-4. Nos d-11 (n= 117), d-4 (n= 351), d0 (n= 214) e d10 (n= 72) foram colhidas amostras de sangue para determinação da concentração de P4. A P/IA foi determinada através de US nos d32 (DG1) e d60 (DG2). Dados binários foram analisados pelo PROC GLIMMIX, e os dados contínuos pelo PROC MIXED do SAS (foi considerada diferença significativa se P<0,05 e tendência se P<0,1). A P4 não diferiu entre os tratamentos no d-11 (1CIDR= 4,2±0,4 ng/ml; 2CIDR= 4,5± 0,4ng/ml; P>0,1), e no d-4 (1CIDR= 3,5±0,2ng/ml; 2CIDR= 3,8±0,2 ng/ml; P>0,1), porém foi detectada interação entre tratamento e presença de CL no início do protocolo na P4 no d-4 (sem presença de CL e 1CIDR= 2,7±0,3ng/ml; 2CIDR= 3,6±0,3ng/ml, com presença de CL e 1CIDR= 4,3±0,3ng/ml; 2CIDR= 4,0±0,3ng/ml; P<0,05). Não houve diferença na prenhez a IATF e nas perdas gestacionais entre os tratamentos [DG1: 1CIDR= 20,0 ...
Abstract: The present study evaluated if P4 concentration during ovulatory follicle development in a timed artificial insemination (TAI) protocol based on P4/E2 affects pregnancy per AI in lactating Holstein cows. Our hypothesis is that cows that present higher P4 concentration at PGF2α administration have also higher fertility. To alter P4, animals (n=594) were randomly assigned to receive one or two intravaginals devices of P4 (CIDR®, Zoetis, SP, Brazil). TAI protocol utilized was: d-11 intravaginal device of P4 (new or previously used by 9 days) + 2mg im EB (Gonadiol®, Zoetis, SP, Brazil) + 100mcg im GnRH (Cystorelin®, Merial, SP, Brazil); d-4, 25mg im Dinoprost (Lutalyse®, Zoetis, SP, Brazil); d-2, 25mg im Dinoprost + 1mg im ECP (ECP®, Zoetis, SP, Brazil) + CIDR removal; d0, TAI. Animals in the group 2CIDR received an adicional CIDR at d-11, which was removed at d-4. At d-11 (n=117), d-4 (n=351), d0 (n=214) and d10 (n=72), blood samples were taken from cows for P4 concentration measurements. Pregnancy per AI was determined by ultrasound at d32 (DG1) and d60 (DG2). The binomial data were analyzed using PROC GLIMMIX and continuous data using PROC MIXED of SAS. An effect was considered significant when P<0.05 and tendency when P<0.1. P4 did not differ among treatments at d-11 (1CIDR=4.2±0.4ng/ml; 2CIDR=4.5±0.4ng/ml; P>0.1), and at d-4 (1CIDR=3.5±0.2ng/ml; 2CIDR=3.8±0.2 ng/ml; P>0.1). An interaction was detected between treatment and CL presence at the beginning of TAI protocol in P4 at d-4 (without CL and 1CIDR=2.7±0.3ng/ml; 2CIDR= 3.6±0.3ng/ml, with CL and 1CIDR=4.3±0.3ng/ml; 2CIDR= 4.0±0.3ng/ml; P<0.05). There was no difference among treatments in pregnancy per AI and pregnancy loss between DG1 and DG2 [DG1: 1CIDR= 20,0% (81/310) vs. 2CIDR= 15,7% (65/284); DG2: 1CIDR= 18,2% (74/310) vs. 2CIDR= 13,8% (57/283); Pregnancy loss: 1CIDR= 14,1% (7/81) vs. 2CIDR= 11,5% (7/64); P>0,1]. 37,0% (28/63)...
Mestre
49
Alves, Aracélle Elisane. "Avaliação da técnica de inseminação artificial intrauterina em fêmeas caninas por videolaparoscopia com sêmen fresco e descongelado /". Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/101126.
Testo completoAbstract (sommario):
Orientador: Wilter Ricardo Russiano VicenteBanca: Ana Paula Coelho Ribeiro
Banca: Maria Isabel de Mello Martins
Banca: Maria Denise Lopes
Banca: Paulo Henrique Franceschini
Resumo: O objetivo deste estudo foi avaliar a taxa de concepção em cadelas após inseminação artificial intrauterina por videolaparoscopia. Um total de 20 cadelas foram inseminadas, sendo 10 com sêmen fresco e 10 com sêmen congelado. Os animais se encontravam em estro natural e sob acompanhamento da citologia vaginal. Quando aproximadamente 90% das células se apresentaram cornificadas, foram realizadas dosagens séricas de progesterona afim de se determinar o momento exato da inseminação. Três machos foram utilizados como doadores de sêmen e as coletas foram realizadas por manipulação digital. Após coleta o ejaculados foram analisados quanto ao volume, motilidade, vigor e concentração espermática. Para a inseminações utilizando sêmen fresco, a coleta foi realizada momentos antes do procedimento, e o sêmen acondicionados em banho-maria a 37°C até o momento da inseminação. Amostras destinadas a inseminação com sêmen descongelado, obtiveram mesmo processo de análises após coleta, seguindo para o processo de congelação, permanecendo congeladas por no mínimo uma semana, e então descongeladas momentos antes do procedimento. De acordo com os concentrações séricas de progesterona, as inseminações intrauterinas por videolaparoscopia foram realizadas, sendo cada corno uterino inseminado com 1mL de sêmen, em concentração de 250x106 espermatozóides/mL nas cadelas inseminadas com sêmen fresco e 80x106 espermatozóides/mL naquelas inseminadas com sêmen congelado. Após 7 dias as cadelas foram ováriosalpingohisterectomizadas, sendo o lúmen das tubas e cornos uterinos lavados com solução de PBS. Embriões foram encontrados nos lavados de 7 cadelas inseminadas com sêmen fresco, e em 5 inseminadas com sêmen descongelado. Concluiu-se que o procedimento de inseminação artificial intrauterina... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The objective of this study was to evaluate the fertility in bitches after intrauterine artificial insemination by videolaparoscopy. A total of 20 bitches were inseminated, being 10 with fresh semen and 10 with frozen. The animals were in natural oestrus, and their vaginal cytology was followed. When approximately 90% of the cells were cornificated, evaluation of serum levels of progesterone was performed, with the objective to determinate the exact moment of the artificial insemination. Three males were used as donors, and the samples collection was performed by digital manipulation. After collection the ejaculates were analysed considering volume, motility, vigor and sperm concentration. For the inseminations using fresh semen the collection was performed minutes before the process, and the semen sample was maintained at 37°C. Samples destined to inseminations using frozen semen were submitted to the same analysis process after collection, followed by the freezing process, being frozen during a minimum period of one week, and thawing moments before the procedure. According to the serum levels of progesterone, the intrauterine inseminations by videolaparoscopy were performed, being each uterine corn inseminated with 1 mL of semen, with 250x106 espermatozoa/mL in bitches with fresh semen and 80x106 espermatozoa/mL in bitches with frozen semen. After 7 days the bitches were ovariohysterectomized, and the lumen of the uterine tube and corns were flushed with PBS solution. Embryos were found in 7 bitches inseminated with fresh semen, and in 5 inseminated with frozen semen. It was concluded that the intrauterine artificial insemination by videolaparoscopy seems to be an interesting reproductive biotechnology method, especially in what refers to the use of frozen semen.
Doutor
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Novaes, Filho Luiz Fernando. "Resposta luteal à PGF2α (Dinoprost Trometamina) durante as fases de luteogênese e manutenção do corpo lúteo em éguas /". Botucatu :, 2014. http://hdl.handle.net/11449/110625.
Testo completoAbstract (sommario):
Orientador: Cezinande de MeiraBanca: João Carlos Pinheiro Ferreira
Banca: Cássia Maria Barroso Orlandi
Resumo: Estudos recentes têm demonstrado diferentes respostas do CL quando da administração de prostaglandina F2α em diferentes doses e momentos. O objetivo deste trabalho foi avaliar o efeito do tratamento com baixas doses de PGF2α sobre características funcionais e estruturais de CLs em fases distintas do diestro em éguas. As éguas foram distribuídas aleatoriamente em 8 grupos: D2-NaCL (n=6; 2 mL de solução de NaCl à 0,9%); D2-Pgf (n=9; 10 mg de Dinoprost Trometamina); D2-1/10Pgf (n=6; 1 mg de Dinoprost Trometamina); D2-1/20Pgf (n=6; 0,5 mg de Dinoprost Trometamina); D8-NaCl (n=7; 2 mL de solução de NaCl à 0,9%); D8-Pgf (n=6; 10 mg de Dinoprost Trometamina); D8-1/10Pgf (n=7; 1mg Dinoprost Trometamina); D8-1/20Pgf (n=7; 0,5 mg de Dinoprost Trometamina). A área total do CL (AT), a perfusão sanguínea objetiva (PVO) e subjetiva (PVS) do CL e as concentrações plasmáticas de progesterona (P4) foram avaliados a cada 6 horas durante 48 horas (H0 = momento imediatamente antes do tratamento). A AT não sofreu interferência da dose de PGF2α independente do dia de tratamento. A P4 apresentou uma correlação positiva com a PVO e PVS, sendo esta última mais sensível na detecção das alterações de P4. O tratamento no D2 não foi capaz de induzir a luteólise completa em nenhuma égua enquanto que o tratamento no D8 promoveu luteólise completa em todas as éguas do grupo controle positivo e parcial e completa em algumas éguas dos grupos D8-1/10Pgf e D8-1/20Pgf. Resposta dose-dependente da PGF2α foi observada, ou seja, quanto menor a dose aplicada menor as quedas em PVS e P4. Conclui-se que a resposta do CL ao tratamento com diferentes doses de PGF2α depende da fase de desenvolvimento do CL
Abstract: Recent studies have demonstrated different response of the CL to different doses of prostaglandin F2α on differente moments. The present experiment aims to evaluate the effect of treatments with PGF2α low doses over functional e structural characteristics of the CLs at two distintic stages. Mares were randomly assigned into groups: D2-NaCL (n=6; 2 mL of saline solution); D2-Pgf (n=9; 10 mg of Dinoprost Tromethamine); D2-1/10Pgf (n=6; 1 mg of Dinoprost Tromethamine); D2-1/20Pgf (n=6; 0,5 mg of Dinoprost Tromethamine); D8-NaCl (n=7; 2 mL of saline solution; D8-Pgf (n=6; 10 mg of Dinoprost Tromethamine); D8-1/10Pgf (n=7; 1mg of Dinoprost Tromethamine); D8-1/20Pgf (n=7; 0,5 mg of Dinoprost Tromethamine). Total area (AT), objective (PVO) and subjective (PVS) vascular perfusion of the CL and plasmatic progesterone (P4) were evaluated every six hours for 48h after treatment (H0 = immediately before treatment). PGF2α did not influenced on AT or day of treatment. P4 showed a positive correlation to PVO and PVS, and PVS was strongly correlated to P4. Treatment on D2 was not able to induce total luteolysis in any mare while treatment on D8 promoted total luteolysis in all mares in group D8-Pgf and 29% and 14% of the mares for the groups D8-1/10Pgf and D8-1/20Pgf, respectively. Parical luteolysis were also detected in groups on D8. The response to PGF2α seems to be dose-dependent, the decrease in PGF2α dose proportionally decreases PVS and P4. It is concluded that CL response to treatment with different doses of PGF2α depends os the CL developmental stage
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