Letteratura scientifica selezionata sul tema "Fertility tips"
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Articoli di riviste sul tema "Fertility tips"
Arab, Maliheh. "Fertility Preservation and Important Tips of Cancer in Adolescent and Young Adult (AYA)". Journal of Obstetrics, Gynecology and Cancer Research 5, n. 1 (1 gennaio 2020): 1–5. http://dx.doi.org/10.30699/jogcr.5.1.1.
Testo completoMizanur Rahim Khan, Md, Mst Hasnunnahar e S. Isshiki. "Production of Amphidiploids of the Hybrids between Solanum macrocarpon and Eggplant". HortScience 48, n. 4 (aprile 2013): 422–24. http://dx.doi.org/10.21273/hortsci.48.4.422.
Testo completoSahin, Hilal, Asli Irmak Akdogan, Janette Smith, Jeries Paolo Zawaideh e Helen Addley. "Serous borderline ovarian tumours: an extensive review on MR imaging features". British Journal of Radiology 94, n. 1125 (1 settembre 2021): 20210116. http://dx.doi.org/10.1259/bjr.20210116.
Testo completoCinnusamy, Prabakaran. "Flowering Annuals Suitable for Problem Soils". International Journal of Current Microbiology and Applied Sciences 12, n. 5 (10 maggio 2023): 99–106. http://dx.doi.org/10.20546/ijcmas.2023.1205.015.
Testo completoJing, Fang, Shangli Shi, Wenjuan Kang, Jian Guan, Baofu Lu, Bei Wu e Wenjuan Wang. "The Physiological Basis of Alfalfa Plant Height Establishment". Plants 13, n. 5 (28 febbraio 2024): 679. http://dx.doi.org/10.3390/plants13050679.
Testo completoFaskhutdinova, Elizaveta, Maria Osintseva e Olga Neverova. "Prospects of Using Soil Microbiome of Mine Tips for Remediation of Anthropogenically Disturbed Ecosystems". Food Processing: Techniques and Technology 51, n. 4 (12 gennaio 2022): 883–904. http://dx.doi.org/10.21603/2074-9414-2021-4-883-904.
Testo completoShi-Qi, Zhou, Qian De-Qi e Cao Xiu-Yun. "Induction of parthenogenesis, and chromosome behavior in plants of parthenogenetic origin in cotton (Gossypium hirsutum)". Genome 34, n. 2 (1 aprile 1991): 255–60. http://dx.doi.org/10.1139/g91-040.
Testo completoBolaños-Villegas, Pablo, Shih-Wen Chin e Fure-Chyi Chen. "Meiotic Chromosome Behavior and Capsule Setting in Doritaenopsis Hybrids". Journal of the American Society for Horticultural Science 133, n. 1 (gennaio 2008): 107–16. http://dx.doi.org/10.21273/jashs.133.1.107.
Testo completoHuang, Yanyan, Yudan Jing, Meirong Bei, Hongzhu Yang, Zhengzao Cha, Qinghuo Lin e Wei Luo. "Short-term effects of organic amendments on soil fertility and root growth of rubber trees on Hainan Island, China". Journal of Forestry Research 31, n. 6 (12 settembre 2019): 2137–44. http://dx.doi.org/10.1007/s11676-019-01023-7.
Testo completoWARD, Madeleine, Lachlan BRENNAN, Michael BARDSLEY, Michael CARTER e Russell DALTON. "Striving for Egg-Cellence: Step-by-Step Guide to Oocyte Pick Up". Fertility & Reproduction 04, n. 03n04 (settembre 2022): 219. http://dx.doi.org/10.1142/s2661318222741303.
Testo completoTesi sul tema "Fertility tips"
Rutigliano, Roberta. "Fertility and family ties in times of demographic changes". Doctoral thesis, Universitat Pompeu Fabra, 2017. http://hdl.handle.net/10803/669620.
Testo completoAquesta tesi investiga com els grans canvis econòmics i demogràfics ocorreguts durant l’últim segle han influenciat les dinàmiques de fertilitat, amb especial èmfasi en els vincles familiars. El primer capítol investiga el rol del tipus de parella en la configuració dels patrons de fertilitat. Mitjançant la comparació de dos països ortogònicament diferents, Noruega i Espanya, analitzem les diferències d’aquests dos països en els comportaments de fertilitat entre la cohabitació i el matrimoni. A Noruega trobem una associació significativa entre la selecció en qualsevol tipus de parella i la fertilitat, mentre que per a Espanya, a on el fenomen de la cohabitació és més recent, trobem una associació significativa entre la fertilitat i la selecció al matrimoni. El segon capítol analitza el paper de l'anomenada família bean-pole en la fertilitat, analitzant en detall si la propensió dels futurs avis a cuidar els seus néts influeix en la transició cap a la paternitat dels seus fills. En aquest cas, i tenint en compte el context nacional, es calculen diferents models per a diferents grups de països. La comparació entre 11 països de les dues primeres ones de l'Enquesta de Salut, Envelliment i Jubilació a Europa (SHARE) revela que la propensió a cuidar els néts té un efecte positiu i significatiu sobre la transició cap a la paternitat, tant per als països pro-natalistes (Bèlgica, França) com per als països pro-tradicionals (Àustria, Alemanya, Grècia, Itàlia, Espanya i Suïssa). Per últim, el tercer capítol es centra en l’efecte que produeix l’atenció als primer néts per part dels avis sobre un possible segon naixement entre les parelles del Regne Unit. Mitjançant l'ús d'un enfocament de la variable instrumental, l’anàlisi es realitza mitjançant les primeres cinc ones del Millennium Cohort Study (MCS). Els resultats mostren un efecte positiu i significatiu dels avis en el risc d’un segon naixement. Aquest efecte està lleugerament debilitat pel nivell d'ingressos.
Nobile, Fabio Olivieri de [UNESP]. "Irrigação com duas qualidades de água e tipos de fertilizações no solo e em cana-de-açúcar". Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/105182.
Testo completoConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O objetivo deste trabalho foi avaliar o uso do composto de lixo, biofertilizante como fonte de nutrientes e resíduo do processamento da bauxita como corretivo da acidez do solo para a cultura da cana-de-açúcar (cana-planta), irrigada com água potável e servida doméstica. Para tanto foi conduzido experimento em vaso, preenchido com Argissolo Vermelho-amarelo distrófico, cultivando a variedade RB855536. Foram avaliadas variáveis químicas do solo na camada de 0-20 e 20-40 cm, da água lixiviada e nas diferentes partes da planta (raiz, colmo e folha), e variáveis biométrias da cultura (altura, diâmetro do colmo, perfilhamento, números de folhas, matéria seca de raiz e da parte aérea). Os resultados obtidos indicaram que o composto de lixo e o biofertilizante constituíram-se como fonte de nutrientes para as plantas de cana-de-açúcar, mas é necessária aplicação adicional de fertilizantes para a obtenção de produção de colmos similares ao do tratamento com adubação mineral convencional, já o resíduo do processamento da bauxita apresentou-se como material corretivo com atributos químicos e físicos semelhantes ao tratamento com adubação mineral e calcário. Os nutrientes presentes na água lixiviada são proporcionais a sua adição ao solo e em função de cada tratamento, sendo que, todos os elementos avaliados estão dentro dos limites estabelecidos pela legislação. Os teores de metais pesados no solo, na planta e na água lixiviada não foram alterados com a aplicação dos resíduos. A qualidade da água de irrigação, potável ou servida, não influenciou as variáveis estudadas.
The agricultural use is an interesting alternative of exploitation of organic residues and industrial for representing you arrive in port of nutrient of plants and organic matter to the soil. In this direction, the objective of this work was to evaluate the use of the urban solid waste, biofertilizer as source of nutrients and residue of the processing of the bauxite as corrective of the acidity of the soil for the culture of the sugar cane (cane plant), irrigated with potable water and wastewater. For in such a way experiment in vase was lead, under soil Alfisol, cultivated with the variety RB855536. They had been evaluated chemical variable of the soil in the layer of 0-20 and 20-40 cm, of the leachate water and the different parts of the plant (root, stalk an leaf), and biometrics variables (height plant, diameter of stem, tillering, numbers of leafs, root dry matter and the aerial part). The nutrients in the leachate water are proportional its addition to the soil and in function of each treatment, being that, all the evaluated elements are inside of the limits established for the legislation. The application of urban solid waste and biofertilizer, in the rates calculated in function of the nitrogen content, and residue of the processing of the bauxite, calculated on the basis of the lime necessity for the method of bases saturation, had not caused deleterious effect in the quality of the soil, of the water and of the raw material produced. The content heavy metal in the soil, the plant and the leachate water had not been modified with the application of the residue in comparison to the mineral fertilization. The quality of the water of irrigation, potable or residuary, did not influence the variable studies.
Tonet, Rodrigo. "Tipos de adubação para a videira 'BRS - violeta' cultivada em latossolo vermelho no sudoeste do Paraná". Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1720.
Testo completoThe vineyard culture, in the Southwest of Paraná, has faced an evolution in recently years. However, some technical barriers has contained the expression of its full potential. Among which, the lack of scientific and technical support about the fertilization management and the fertility maintenance of production fields, is the most worrying. This fact, allied with the raising on the consumers demand for ecological correct products, are the motivations for the present study, whose main objective was to evaluate the effects of different fertilizer formulations, based on alternative nutrient sources, on grapevine yield and grape fruit quality, aiming at the improvement of those parameters and the maintenance of soil fertility. To achieve this goal, an experiment has been evaluated since 2008, at the experimental area of the Federal Technological University of Paraná, Campus Pato Branco, where ten treatments were being tested, combining or isolating shale derivates from other alternative nutrient sources. Those are the treatments: T1: Gafsa Rock Phosphate (GRP) + K2SO4; T2: GRP + RPB (Rock Powder Bioland®); T3: GRP + K2SO4 + LH (Laying Hen Litter); T4: GRP+ RPB + LH; T5: GRP + K2SO4 + MBR (Matrix Shale 3); T6: GRP + RPB + MBR; T7: GRP + K2SO4 + MBR + LH; T8: GRP + RPB + LH + MBR; T9: TSP (Triple Superphosphate) + Urea + KCl and T10: absolute control. The usage of fertilization, specially the alternative fertilization, improved soil fertility characteristics and also the yield on the last two evaluated harvests. The potassium sulfate improved the potassium availability on soil, while improved yield on the last three harvests. The MBR improved the phosphorus availability, improved post-harvest conservation and improved the yield on the last evaluated harvest.
GOMES, André Ângelo Medeiros. "Frequência de hermafroditas e distribuição de tipos de acasalamento em populações de Fusarium verticillioides associadas ao milho em diferentes zonas climáticas do Brasil". Universidade Federal Rural de Pernambuco, 2013. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6417.
Testo completoMade available in DSpace on 2017-02-17T12:29:16Z (GMT). No. of bitstreams: 1 Andre Angelo Medeiros Gomes.pdf: 644128 bytes, checksum: cd67aaf23e82d52d2fc876105888dc75 (MD5) Previous issue date: 2013-02-18
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Brazil is one of the biggest producers and consumers of maize (Zea mays L.) in the world and the fusariosis caused by F. verticillioides, on ears and or on stalk, is a recurrent problem when environmental conditions favor epidemics in the field or in storage. The present study aimed to characterize through crosses the F. verticillioides isolates from the three main climatic zones where maize is grown in Brazil. The fertility and effective population size were calculated from data generated by crossing field isolates with female fertile testers of F. verticillioides. For the entire population, 231 out of 300 isolates were cross-fertile with tester isolates. MAT-1 and MAT-2 idiomorphs of the fertile isolates segregated in a 105:126 rate. Female isolates (hermaphrodites) were 96 out of 231 fertile isolates, while 135 were male only isolates. The Ne(mt) was 99% of the count for the Brazilian population when the mating type idiomorphs were used as predictors in the estimative of the population size. But when this calculation was made on the basis of the female fertile isolates the Ne(f) was 83%. When the total population is divided into sub-populations representing climatic zones, the frequencies of female fertile isolates were 33 out of 80 fertile isolates from the Equatorial Tropical Zonal Climate (ETZC); 14 out of 78 fertile isolates from the Temperate Zonal Climate (TZC); and 49 out of 73 fertile isolates from the Tropical Central Brazil Zonal Climate (TCBZ). The effective population size expressed in percentage of the total number of individual in each population for the three populations represented by isolates from the ETZC, TZC and TCBZ were Ne(mt) = 99, 100, 97 and Ne(f) = 83, 52, 96 respectively. The Brazilian population of F. verticillioides shows high fertility and high effective population size, suggesting the possibility of frequent sexual reproduction in the field. Apparently there is a tendency of higher fertility in populations established at low latitudes, represented by the tropical climate.
O Brasil é um dos maiores produtores e consumidores de milho (Zea mays L.) do mundo e a fusariose, causada por Fusarium verticillioides, seja em espigas ou no colmo, é um problema recorrente quando condições ambientes favorecem o surgimento de epidemias no campo ou em armazenamento. O presente trabalho teve como objetivos caracterizar por meio de cruzamentos sexuais, isolados de F. verticillioides dos três principais climas zonais que se cultiva milho no Brasil. Através de cruzamentos de isolados do campo de F. verticillioides, com testadores de G. moniliformis; e determinar a taxa de fertilidade, frequência de hermafroditismo, e tamanho efetivo da população. Dos 300 isolados estudados, 231 tiveram cruzamento fértil. Os tipos de acasalamento MAT-1 e MAT-2 segregaram numa proporção 105:126. Entre os 231 isolados férteis, 96 se comportaram como hermafroditas e 135 como fêmeas estéreis. Na população total, do Brasil, levando em consideração o tipo de acasalamento, o tamanho efetivo da população Ne(mt), foi de 99% da população total, e tomando por base a frequência de hermafrodita , o tamanho efetivo Ne(f) foi de 83% da população total. Quando o número total de isolados é subdividido em três populações distintas, baseado nas condições de clima de local de coleta dos isolados, as frequências de hermafroditas foram; 33 hermafroditas dentre 80 isolados férteis do Clima Zonal Tropical Equatorial (ZTE), com 47 se comportando como fêmea estéril; 14 hermafroditas dentre 78 isolados férteis do Clima Zonal Temperado (ZT), com 64 se comportando como fêmea estéril; e 49 hermafroditas dentre 73 isolados do Clima Zonal Tropical Brasil Central (ZTBC), com apenas 24 se comportando como fêmea estéril. O tamanho efetivo das populações representadas por isolados dos climas ZTE, ZT e ZTBC, foram Ne(mt) = 99, 100, 97 e Ne(f) = 83, 52, 96 respectivamente, expresso em porcentagem do número total de indivíduos de cada população. A população brasileira de F. verticillioides analisada apresenta alto índice de fertilidade e tamanho efetivo, sugerindo a possibilidade de frequente reprodução sexuada no campo. Aparentemente, existe uma tendência de maior fertilidade da população em latitudes menores, representadas pelo clima tropical.
Nobile, Fabio Olivieri de. "Irrigação com duas qualidades de água e tipos de fertilizações no solo e em cana-de-açúcar /". Jaboticabal : [s.n.], 2009. http://hdl.handle.net/11449/105182.
Testo completoBanca: Raimundo Leite Cruz
Banca: Ariovaldo Luchiari Junior
Banca: Renato de Mello Prado
Banca: Jairo Augusto Campos de Araújo
Resumo: O objetivo deste trabalho foi avaliar o uso do composto de lixo, biofertilizante como fonte de nutrientes e resíduo do processamento da bauxita como corretivo da acidez do solo para a cultura da cana-de-açúcar (cana-planta), irrigada com água potável e servida doméstica. Para tanto foi conduzido experimento em vaso, preenchido com Argissolo Vermelho-amarelo distrófico, cultivando a variedade RB855536. Foram avaliadas variáveis químicas do solo na camada de 0-20 e 20-40 cm, da água lixiviada e nas diferentes partes da planta (raiz, colmo e folha), e variáveis biométrias da cultura (altura, diâmetro do colmo, perfilhamento, números de folhas, matéria seca de raiz e da parte aérea). Os resultados obtidos indicaram que o composto de lixo e o biofertilizante constituíram-se como fonte de nutrientes para as plantas de cana-de-açúcar, mas é necessária aplicação adicional de fertilizantes para a obtenção de produção de colmos similares ao do tratamento com adubação mineral convencional, já o resíduo do processamento da bauxita apresentou-se como material corretivo com atributos químicos e físicos semelhantes ao tratamento com adubação mineral e calcário. Os nutrientes presentes na água lixiviada são proporcionais a sua adição ao solo e em função de cada tratamento, sendo que, todos os elementos avaliados estão dentro dos limites estabelecidos pela legislação. Os teores de metais pesados no solo, na planta e na água lixiviada não foram alterados com a aplicação dos resíduos. A qualidade da água de irrigação, potável ou servida, não influenciou as variáveis estudadas.
Abstract: The agricultural use is an interesting alternative of exploitation of organic residues and industrial for representing you arrive in port of nutrient of plants and organic matter to the soil. In this direction, the objective of this work was to evaluate the use of the urban solid waste, biofertilizer as source of nutrients and residue of the processing of the bauxite as corrective of the acidity of the soil for the culture of the sugar cane (cane plant), irrigated with potable water and wastewater. For in such a way experiment in vase was lead, under soil Alfisol, cultivated with the variety RB855536. They had been evaluated chemical variable of the soil in the layer of 0-20 and 20-40 cm, of the leachate water and the different parts of the plant (root, stalk an leaf), and biometrics variables (height plant, diameter of stem, tillering, numbers of leafs, root dry matter and the aerial part). The nutrients in the leachate water are proportional its addition to the soil and in function of each treatment, being that, all the evaluated elements are inside of the limits established for the legislation. The application of urban solid waste and biofertilizer, in the rates calculated in function of the nitrogen content, and residue of the processing of the bauxite, calculated on the basis of the lime necessity for the method of bases saturation, had not caused deleterious effect in the quality of the soil, of the water and of the raw material produced. The content heavy metal in the soil, the plant and the leachate water had not been modified with the application of the residue in comparison to the mineral fertilization. The quality of the water of irrigation, potable or residuary, did not influence the variable studies.
Doutor
Hax, Lucas Teixeira. "Efeito de polimorfismos no receptor do hormônio do crescimento (GHR) e no fator de crescimento semelhante à insulina tipo 1 (IGF-I) no intervalo parto-concepção e produção de leite de vacas da raça Holandês". Universidade Federal de Pelotas, 2013. http://repositorio.ufpel.edu.br/handle/ri/1214.
Testo completoThe genes of the somatotropic axis, which act regulating the metabolism and physiology of the mammals, present polymorphism associated to some characteristics of economical interest, such as reproductive performance and milk production. Such factors may be influenced by the mutation on only one nucleotide in the base sequence of the gene of the growth hormone receptor (GHR), which may alter the density of GHR on the hepatic tissue. Changes in the coupling of the growth hormone (GH) in the hepatic tissue alter the serum concentration of the insulin-like growth factor 1 (IGF-I), as IGF-I is produced mainly by the liver when it is stimulated by the growth hormone. Different studies have evaluated the effect of polymorphisms in the gene responsible for encoding IGF-I on the reproductive performance and milk production of high production dairy cows. Among other functions, the IGF-I mediates the effects of gonadotropins on the follicular cells, stimulating the growth and differentiation of theca and granulosa follicular cells, playing also a significant role on the final growth and maturation of the dominant follicle. Furthermore, high serum IGF-I concentrations are associated with a earlier return to cyclicity post partum in high yield dairy cows. Thus, the objective of this study was to evaluated the relevance of the mutations in GHR and IGF-I on the calving conception interval, number of inseminations per pregnancy and milk production in Holstein cows. One hundred and fifty five Holstein cows, submitted to a semi extensive management system, subjected to fixed-time artificial insemination (TAI) that got pregnant up to 250 days in milk in 2011, were selected. Among the animals tested, 29% presented GHR AluI (+ / +), 57.5% AluI (+ / -) and 13.5% AluI (- / -) genotype. 34.9% presented IGF-I SnaBI (+ / +), 45.8% SnaBI (+ / -) and 19.3% SnaBI (- / -) genotype. No association was observed between GHR AluI and IGF-I SnaBI genotypes and calving conception interval, number of inseminations per pregnancy and milk yield (P> 0.05). Likewise, there was no association between the interaction of GHR AluI and IGF-I SnaBI genotypes and calving conception interval, number of inseminations per pregnancy and milk yield (P> 0.05). Finally, further studies are necessary to better understand the relevance of GHR AluI and IGF-I SnaBI genotypes to the calving conception interval number of inseminations per pregnancy and milk production in Holstein cows.
Os genes do eixo somatotrópico, que atuam na regulação do metabolismo e fisiologia dos mamíferos, apresentam polimorfismos associados a algumas características de interesse econômico, como desempenho reprodutivo e produção de leite. Tais fatores podem ser influenciados por mutações de apenas um nucleotídeo na sequência de bases do gene do receptor do hormônio do crescimento (GHR), que podem alterar a expressão do GHR no tecido hepático. Mudanças no acoplamento do hormônio do crescimento (GH) no tecido hepático alteram a concentração sérica de fator de crescimento semelhante à insulina tipo1 (IGF-I), visto que o IGF-I tem sua produção endócrina principalmente no fígado mediante estimulação do hormônio do crescimento. Diversos trabalhos têm estudado o efeito de polimorfismos no gene que codifica para IGF-I no desempenho reprodutivo e produção de leite de vacas leiteiras de alta produção. Entre outras funções, o IGF-I atua como mediador dos efeitos das gonadotrofinas nas células foliculares, estimulando o crescimento e diferenciação das células da teca e da granulosa foliculares, apresentando também um importante papel no crescimento final e na maturação do folículo dominante. As altas concentrações sanguíneas de IGF-I estão também associadas a um retorno à ciclicidade mais precoce de vacas leiteiras pós-parto de alta produção. Dessa forma, o objetivo deste estudo foi avaliar a importância de mutações no GHR e IGF-I no desempenho zootécnico, IPC, número de inseminações por prenhez e produção de leite em vacas da raça Holandês. Foram avaliadas 155 vacas da raça Holandês em sistema semi extensivo submetidas à inseminação artificial em tempo fixo (IATF) e que conceberam até 250 dias em lactação no ano de 2011. Entre os animais analisados, 29% apresentaram o genótipo GHR AluI, (+/+), 57,5% AluI (+/-) e 13,5% AluI (-/-). Já para o IGF-I SnaBI 34,9% apresentaram o genótipo IGF-I SnaBI (+/+), 45,8% SnaBI (+/-) e 19,3% SnaBI (-/-). Não foi observada associação entre os genótipos GHR AluI e IGF-I SnaBI e o intervalo parto-concepção, número de inseminações por prenhez e produção de leite (P>0,05). Da mesma forma, não houve associação entre a interação dos genótipos de GHR AluI e IGF-I SnaBI e o intervalo parto-concepção, número de inseminações por prenhez e produção de leite (P>0,05). Finalmente, novos estudos avaliando uma maior população de animais são necessários para elucidar a importância dos genótipos de GHR AluI e IGF-I SnaBI no intervalo parto-concepção, número de inseminações por prenhez e produção de leite.
Rato, Luís Pedro Ferreira. "High-energy diets and Diabetes Mellitus: a threat for male fertility". Doctoral thesis, 2015. http://hdl.handle.net/10400.6/4253.
Testo completoThe survival of the human being lies in a healthy fertility, however, in last decades it has been observed a decline in male fertility. This problem has a particular focus in modern societies, but in the near future will be present in developing countries. External factors associated with lifestyle, such as erroneous eating habits, particularly the excessive intake of high energy diets, have contributed to the increase of metabolic diseases, including obesity and diabetes mellitus (DM). Indeed, the combination of factors such as: changes in the composition of foods, increased consumption of high-energy diets, consumption of foods with high levels of sugar and saturated fats, sedentary lifestyle and the lack of physical activity are the main cause for the increase of this pathology. Obesity and DM are public health problems in developed countries and its incidence has been increasing rapidly among men of reproductive age, contributing to the emergence of subfertility and infertility in these individuals. The metabolic and hormonal dysregulation associated with these pathological stages compromises the male reproductive function, since the hypothalamus-pituitary gonadal axis, also known as reproductive axis, is sensitive to the subtle metabolic disturbances. Testicular tissue consists of a heterogeneous population of somatic and germ cells, where germ cells are dependent on the nutritional support provided by Sertoli cells and any metabolic disorder may alter this metabolic cooperation. Metabolism of testicular cells, in particular of Sertoli cells, present some unique features. Sertoli cells are able to metabolize various substrates (e.g.: glucose, fatty acids, ketone bodies), preferentially metabolizing glucose, being the majority of it converted to lactate and not oxidized via Krebs’ cycle. The mechanisms that regulate the metabolism of Sertoli cells are essential for spermatogenesis and this metabolic process is regulated by several factors, among which insulin and sexual steroid hormones play an important role. Metabolic diseases, such as DM, present in its origin insulin resistance and/or absence, as well as an inability of cells to efficiently respond to insulin stimulation. Given the relevance of this hormone on glucose metabolism and the fact that Sertoli cells express the specific receptors for insulin, we evaluated the metabolic behavior of Sertoli cells under insulin deprivation conditions. In these circumstances, Sertoli cells altered their glycolytic metabolism, decreasing the rate of lactate production through the modulation of the expression of proteins associated with the production and export of lactate. This suggests that Sertoli cells are affected in their metabolic activity under specific pathological conditions associated with insulin deregulation, such is the case of DM. DM induces a generalized endocrine disruption. A direct consequence of DM on testicular function is the inhibition of the synthesis of testosterone (T) and the more severe is the state of DM, the greater the reduction in levels of T. In this work, we showed that the sex steroids, particularly testosterone (and its non aromatizable metabolite 5-dihydrotestosterone) and 17β-estradiol, modulate the glycolytic metabolism of Sertoli cells, favoring the increase of glucose consumption, although the production of lactate is not promoted. In fact, lactate production, which is the primary substrate of developing germ cells, is diminished by the androgenic action. We further studied the effects of T deficiency induced by different stages of DM, pre-diabetes and type 2 diabetes mellitus, in the glycolytic metabolism of Sertoli cells. Our results showed that the more advanced is the state of the disease, the more the glycolytic pathway is compromised. Interestingly, Sertoli cells cultured under T conditions similar to those of type 2 diabetes mellitus stage are able to adopt alternative mechanisms that promote the use of alternative substrates, such as glycogen. At testicular level, it was evidenced that the pre-diabetic state induced by high-energy diets consumption also alters the glycolytic metabolism. Under these conditions, the glycolytic pathway is favored, given the increased expression and activity of essential proteins involved in this metabolic pathway. The expression of proteins associated with the production of lactate is also increased, which may have contributed to the increase in the testicular lactate content. However, and despite the metabolic adaptation observed, the reproductive parameters were affected, which may result from the favoring of a high oxidative environment. In fact, in those conditions, we observed a significant decrease in the expression of proteins involved not only in the maintenance of mitochondrial biogenesis, as in the activation of the reactive oxygen species defense system. The decreased testicular antioxidant potential, as well as the altered mitochondrial respiratory function contributed to a deficient bioenergetic capacity and augmented oxidative environment. In more advanced states of disease, as is the case of type 2 diabetes mellitus, testicular glycolytic metabolism was seriously compromised. Lactate dehydrogenase activity was severely diminished contributing to lower testicular content of lactate. Moreover, in those conditions there seems to be an adaptation of the testicular metabolism, reflected in the content of glycogen in the testes, which was increased. These results implied a testicular metabolic reprogramming under type 2 diabetes mellitus conditions, which promoted alternative metabolic pathways. However, the sperm parameters of the individuals with type 2 diabetes mellitus were seriously compromised, since motility and viability were substancially decreased and the number of sperm with abnormal morphology was increased. In conclusion, this study showed that metabolic diseases, particularly DM, contribute to a decrease in male reproductive potential by promoting profound alterations in testicular cellular metabolism, and particularly in the metabolism of Sertoli cells. Spermatogenesis is a complex process and the glycolytic metabolism is pivotal for the success of this cellular event. Glucose metabolism in Sertoli cells is targeted by numerous regulatory factors and both the initial and the advanced stages of DM the metabolism of glucose is altered in these cells. Furthermore, the more pronounced effects were observed in the most advanced stages of DM. In fact, we observed that, in the prodromal stage of DM, testicular metabolism tends to adapt in order to ensure an adequate production of lactate for developing germ cells. However, in more advanced stages of that disease, lactate production is seriously compromised. Moreover, these metabolic changes were associated with a decline in the reproductive parameters, that may lead to infertility, and that surely will be accountable for the decline in male reproductive health.
Correia, Marina José Simões do Nascimento. "Análise de fatores ambientais que influenciam o intervalo entre partos em bovinos mertolengos". Master's thesis, 2019. http://hdl.handle.net/10400.26/30648.
Testo completoThe aim of this study was to analyze the main environmental factors influencing the calving interval (CI) in Mertolenga cattle, particularly the effect of the type of breeding (fixed breeding season versus continuous breeding). A total of 46613 CI records were collected, from 2000 to 2019, regarding 8452 Mertolenga cows in 27 farms. The records were first subjected to PRO® MEANS and PROC FREQ SAS® programs and subsequently to PROC MIXED SAS® mixed model. Variables included fixed effects of the breeder, year of delivery, type of breeding (fixed and continuous), calf sex and breed. Linear and quadratic effects of age of calving and age at first calving were co-variables and the female (cow) was considered a random effect. Mean age at first calving was found at 35,5±9,0 months, mean age at calving at 87,9±41,7 months and CI at 436,5±128,2 days. The results of the analysis of variance of CI indicated that there are significant differences between females (p <0,01), considering that all environmental factors included in the model (breeder, year of calving, type of calving, sex and calf breed, age at calving and age at first calving) have a significant effect (p <0,01) on CI values. Large differences in CI values were observed between farms and years of calving and that breeders that chose continuous breeding have a lower CI averages (≈430 days) in comparison to defined seasons (38438 days). There are significant differences between calving females in spring / summer (438,753±1,325/439,833±1,286) and calving females in autumn/winter (449,529±1,217/447,391±1,163). Cows that give birth to female calves, on average, have lower CIs (437,534±0,897) than calves that give birth to male calves (443,534±0,901). Cows giving birth to pure Mertolenga calves have lower CIs (422,156±0,833) than those giving birth to cross calves (445,156±1,190). Age at calving and age at first calving have a quadratic effect on CI with lower values when females are approximately 8,5 years old and when they first calve at about 36,9 months. Due to the impact that the CI has on the productivity of beef cattle farms, it is important to acknowledge influencing factors, allowing for possible improvements in farm management. As far as cow selection is concerned, understanding and considering non-genetic factors influencing CI would be extremely beneficial.
Costa, Luís Diogo Pereira da. "Avaliação da taxa de fertilidade em éguas da raça puro sangue lusitano : efeito da idade da égua e do tipo de cobrição (cobrição natural vs inseminação artificial)". Master's thesis, 2014. http://hdl.handle.net/10437/4753.
Testo completoAo longo dos meses de estágio acompanhei diversos procedimentos médicos veterinários, sendo que a maior parte deles diziam respeito à área da reprodução equina. A Raça Puro Sangue Lusitano (PSL) é a mais importante raça portuguesa autóctone de equinos. Contudo, não existem muitos estudos no que respeita à sua eficiência reprodutiva. Este trabalho pretende fazer um estudo sobre o efeito da idade da égua e do tipo de cobrição (natural e inseminação artificial - IA) na taxa de fertilidade de éguas PSL, através do cálculo das diferentes taxas de gestação. Neste estudo, verificou-se que a percentagem de éguas gestantes no final da época reprodutiva foi de 90%, encontrando-se dentro dos valores esperados (71% - 96%). Os dados foram recolhidos durante a época reprodutiva de 2011/2012 e permitiram-me elaborar um estudo retrospectivo para melhor perceber a prática do maneio reprodutivo equino e a influência de alguns parâmetros na taxa de fertilidade das éguas. Relativamente aos diferentes tipos de sémen, verificou-se que a taxa de fertilidade em éguas cobertas por cobrição natural (n=14) foi de 78,6% e por IA (n=36) foi de 94,4%, resultado que se situa dentro dos valores esperados. No que respeita à IA, a taxa de fertilidade com sémen fresco (n=16) foi de 93,8%, com sémen refrigerado (n=19) foi de 94,7% e com sémen congelado (n=1) foi de 100%. Os valores para sémen fresco e refrigerado encontram-se dentro do esperado, sendo que para sémen congelado este é muito superior aos valores reportados na bibliografia, visto ser o tipo de sémen com menores taxas de fertilidade. Este facto deve-se, provavelmente, à dimensão da amostra, e ao facto de o sémen congelado ser de elevada qualidade. Neste estudo verificamos também que não há relação estatística entre a idade das éguas e a taxa de gestação, contrariamente ao que é referido na bibliografia, o que se deverá provavelmente ao tamanho da amostra (n=50).
During my internship I have observed and participated in clinical procedures, most of them regarding equine reproduction. The Lusitanian Pure Blood (PSL) is the most important Portuguese autochthonous breed. However there aren't many studies regarding its reproductive efficiency. This paper intends to study the effect of the mare's age and of the type of breeding (natural and artificial insemination - IA) in the fertility rate of PSL mares, using the calculation of the pregnancy rates. In this study it was verified that the percentage of pregnant mares by the end of the reproductive season was 90%, being within the expected values (71 - 96%). Concerning the type of mating it was verified that the pregnancy rate in mares using natural mating (n=14) was 78,6%, and using IA (n=36) was 94,4%, results within the expected values. The data was collected during the reproductive season of 2011/2012 and allowed me to elaborate a retrospective study in order to better understand equine reproduction practice and the influence of some parameters in the mares pregnancy rate. Regarding the IA, the pregnancy rate using fresh semen (n=16) was 93,8%, cooled semen (n=19) was 94,7% and frozen semen (n=1) was 100%. The values regarding fresh and cooled semen are within the expected, however for frozen semen it is too high when compared with values reported on the bibliography, since it is the type of semen with lower pregnancy rates. This is probably due to the dimension of the sample, and that the frozen semen was of very high quality. In this study it was also verified that there is no statistical relationship between the mare's age and the pregnancy rate, contrasting with what is said in the bibliography, probably due to the dimension of the sample (n=50).
Libri sul tema "Fertility tips"
Hahn, Kim. Fertility facts: Hundreds of tips for getting pregnant. San Francisco: Chronicle Books, 2008.
Cerca il testo completoDufour, Anne. Fertility (60 Tips). Hachette Illustrated UK, 2005.
Cerca il testo completoChester, Rita. Fertility: 39 Tips to Boost Women's Health and Fertility. Independently Published, 2017.
Cerca il testo completoHahn, Kim, Jennifer L. Howse e Conceive Magazine Editors. Fertility Facts: Hundreds of Tips for Getting Pregnant. Chronicle Books LLC, 2012.
Cerca il testo completoARMSTRONG, Cynthia. Male Fertility: Everything You Need to Know about Male Fertility and Tips on How to Boost Male Fertility. Independently Published, 2022.
Cerca il testo completoElliott, Steven. Quick Remedy for Vaginal Thrush : Modern and Natural Tips: Girl-Child Fertility Freshness Sex-Life and Womanhood. Independently Published, 2021.
Cerca il testo completoNelson, Dana. Maximizing Fertility + Simple Tips for Newborn Parenting: A Proven Guide to a Successful Pregnancy and an Effective Parenting Guide for Your Newborns Care and Healthy Development. Independently Published, 2020.
Cerca il testo completoM. Saadeldin, Islam, a cura di. Advances in Assisted Reproduction Technologies. BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/97898150516671220501.
Testo completoCapitoli di libri sul tema "Fertility tips"
Smith, James F., e Ajay K. Nangia. "Epididymovasostomy: Tips and Tricks of the Trade". In Microsurgery for Fertility Specialists, 69–83. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-4196-0_5.
Testo completoReher, David S. "Family Ties in Western Europe". In Strong Family and Low Fertility: A Paradox?, 45–76. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/1-4020-2837-7_3.
Testo completoMacAskill, Findlay, e Archie Fernando. "Metastatic testicular cancer: post-chemotherapy residual mass and cancer survivorship". In Challenging Cases in Urological Surgery, a cura di Karl H. Pang, James W. F. Catto, Aung Myat e Shouvik Haldar, 199–208. Oxford University PressOxford, 2023. http://dx.doi.org/10.1093/med/9780198854371.003.0020.
Testo completoGietel-Basten, Stuart, e Tomáš Sobotka. "Future Fertility in Low Fertility Countries". In World Population & Human Capital in the Twenty-First Century. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198813422.003.0007.
Testo completoWardi, Anissa Janine. "Brown Ecology and Fertility". In Toni Morrison and the Natural World, 25–61. University Press of Mississippi, 2021. http://dx.doi.org/10.14325/mississippi/9781496834164.003.0002.
Testo completoArthur, John W. "Meso- and South America". In Beer, 136–67. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780197579800.003.0006.
Testo completoGoldberg, Abbie E. "Getting to Adoption". In Open Adoption and Diverse Families, 21–46. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190692032.003.0002.
Testo completoSigurðsson, Jón Viðar. "Religion and Power". In Scandinavia in the Age of Vikings, 110–29. Cornell University Press, 2022. http://dx.doi.org/10.7591/cornell/9781501760471.003.0008.
Testo completoGroen-Vallinga, Miriam J. "Family Economics". In Work and Labour in the Cities of Roman Italy, 81–148. Liverpool University Press, 2023. http://dx.doi.org/10.3828/liverpool/9781802077599.003.0003.
Testo completoAtti di convegni sul tema "Fertility tips"
Majstorović, Helena, Bogdan Garalejić, Maja Sudimac, Miloš Pavlović e Vladimir Čolović. "PARAMETRI PLODNOST ZEMLJIŠTA U FUNKCIJI TIPA ZEMLJIŠTA NA TERITORIJI GRADA PANČEVA 2022ЗБОРНИК БИОДИВЕРЗИТЕТ". In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.395m.
Testo completoGaralejić, Bogdan, Helena Majstorović, Maja Sudimac, Miloš Pavlović e Vladimir Čolović. "FIZIČKE OSOBINE ZEMLJIŠTA U FUNKCIJI TIPA ZEMLJIŠTA NA TERITORIJI GRADA PANČEVA". In XXVII savetovanje o biotehnologiji. University of Kragujevac, Faculty of Agronomy, 2022. http://dx.doi.org/10.46793/sbt27.359g.
Testo completoBlake Jackson, Eric, Ingrid Pappel e Sadok Ben Yahia. "Transnational Innovation Networks, Population Aging and The Silver Economy: Challenges, Opportunities and the State of Play". In 14th International Conference on Applied Human Factors and Ergonomics (AHFE 2023). AHFE International, 2023. http://dx.doi.org/10.54941/ahfe1003895.
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