Dissertationen zum Thema „Assited Reproductive Technology“
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Morgan, Jonathan J. „State Regulation of Assisted Reproductive Technology“. BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2206.
Der volle Inhalt der QuelleBatty, Lynne Patricia. „Assisted Reproductive Technology: The Aotearoa/New Zealand Policy Context: A thesis submitted in fulfilment of the requirements for the degree of Master of Arts in Sociology in the University of Canterbury“. Thesis, University of Canterbury. Sociology, 2002. http://hdl.handle.net/10092/912.
Der volle Inhalt der QuelleHamdan, Mukhri. „Endometriosis and assisted reproduction technology“. Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/416621/.
Der volle Inhalt der QuelleWilson, Poe Emma. „Vitrification of day 5/6 human morulas/blastocysts: A 10 year retrospective study in a private assisted reproductive techniques [ART] clinic“. Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96876.
Der volle Inhalt der QuelleENGLISH ABSTRACT: This study was designed to retrospectively evaluate the established embryo vitrification/warming programme currently implemented at Drs Aevitas Institute for Reproductive Medicine and to look at factors that might play a role in optimizing the pregnancy outcomes thereof. Vitrification is the achievement of a “state of suspended animation” wherein molecular translational motions are arrested without structural reorganization of the liquid. In embryo vitrification it involves placement of the embryo in a very small volume of vitrification medium that must be cooled at extremely high cooling rates. The vitrification medium contains cryoprotectants to prevent any cryoinjury from occurring to the embryo. This process was initially proposed to effectively manage supernumerary embryos, but it has also provided a viable method of reducing costs for additional embryo transfers as well as the reduction of the incidence of multiple births. Patients who are at risk of ovarian hyper stimulation syndrome (OHSS) can also have all of their embryos vitrified in advance to reduce the likelihood of adverse clinical symptoms if a pregnancy is established. Throughout the period in which vitrification has been in practice, there have been advances in technology as well as continual research being conducted to establish whether newly suggested techniques do, in fact, optimize the outcomes of vitrification. Focus has subsequently been applied to the carrier device used for vitrification, the day on which the embryos are vitrified and stored, as well as the number of embryos transferred in each respective cycle, all to ensure the most favourable outcome. This retrospective study confirmed the use of the Cryotop® as the most viable carrier device for successful survival and pregnancy outcomes. Transfer of day 5 vitrified embryos resulted in significantly higher pregnancy rates compared to day 6 vitrified embryos. Results also indicated that the number of embryos transferred does indeed have a significant effect on the pregnancy outcome and consequently we can possibly argue against the implementation of single embryo transfer in the vitrification programme. Investigation into the effect of female age, specifically oocyte age, on each of these categories indicated that reduced age can be associated with optimal outcomes; however this could not be proven statistically in this cohort of patients. To further look at optimization of the vitrification/warming programme, a Literature Survey was conducted to ascertain the results after Assisted Hatching in frozen/warmed human embryos. Assisted Hatching has been proposed as a solution to Zona Pellucida hardening, which has been found to occur during vitrification. The need for further studies and a meta-analysis of the literature is confidently proposed, as well as a Prospective Study to evaluate the effect of Laser Assisted Hatching in the human blastocyst vitrification/warming programme at Drs Aevitas Institute for Reproductive Medicine.
AFRIKAANSE OPSOMMING: Hierdie studie is ontwerp om die gevestigde embrio vitrifikasie/ontdooi program by Drs Aevitas Instituut vir Reproduktiewe Medisyne, retrospektief te evalueer en die faktore te optimaliseer wat swangerskap uitkomste kan beïnvloed. Vitrifikasie is die proses waardeur die molekulere aktiwiteit binne die embrio in ‘n staat van arres gehou word sonder om die strukture binne die sitplasma te versteur. Dit behels die plasing van ʼn embrio in 'n klein hoeveelheid vitrifikasie medium wat teen 'n hoë tempo afgekoel word. Die vitrifikasie medium bevat kriobeskermmiddels wat die embrio tydens die vitrifikasie proses teen moontlike skade beskerm. Hierdie proses is aanvanklik voorgestel om oortollige embrio’s doeltreffend te bestuur. Dit bied ʼn koste effektiewe metode vir embrio terugplasing, en verlaag die insidensie van veelvoudige swangerskap. Vitrifikasie bied pasiënte met ʼn hoë risiko vir ovariale hiperstimulasiesindroom (OHSS) ‘n alternatief om nadelige kliniese simptome te vermy indien ʼn swangerskap bereik word. Tegnologiese vordering en voortdurende navorsing ondersoek voortdurend nuwe tegnieke vitrifikasie uitkomste te optimaliseer. Fokus word geplaas op die draertoestel wat gebruik word vir vitrifikasie, die dag waarop die embrio's gevitrifiseer en gestoor word, sowel as die aantal embrio’s wat met elke vitrifikasie siklus teruggeplaas word. Hierdie retrospektiewe studie het bevestig dat die gebruik van die Cryotop® die mees suksesvolle toestel vir oorlewing en swangerskap uitkomste is. Die terugplasing van dag 5 gevitrifiseerde embrios het beduidende hoër swangerskapsyfers as dag 6 embrios tot gevolg gehad. Die resultate het ook aangedui dat die aantal embrio's wat teruggeplaas word 'n beduidende uitwerking op die swangerskapsyfer het. Daar kan dus moontlik teen die implementering van 'n enkel embrio-terugplasing neiging in die vitrifikasie program geargumenteer word. Resultate het ook getoon dat optimale uitkomste verwant is aan ʼn laer oösiet ouderdom, alhoewel dit nie in die groep pasiente statisties bewys kon word nie. 'n Literatuurstudie oor AH (Assisted Hatching) op gevitrifiseerde/ontdooide menslike embrio’s is uitgevoer om die vitrifikasie/ontdooi program verder te optimaliseer. AH bied ‘n oplossing vir Zona pellucida verharding, wat tydens vitrifikasie plaasvind. Verdere studies, 'n meta-analise van die literatuur, sowel as 'n prospektiewe studie om die effek van laser AH in gevitrifiseerde/ontdooide menslike blastosiste by Drs Aevitas Instituut vir reproduktiewe medisyne te evalueer, word voorgestel.
Mayeur, Anne. „La prévention des maladies mitochondriales par mutation de l'ADNmt : de la clinique au transfert de pronoyaux“. Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASL084.
Der volle Inhalt der QuelleMitochondria have the unique characteristic of possessing their own genome, mitochondrial DNA (mtDNA), which is exclusively transmitted by the mother through the cytoplasm of the oocyte. Pathogenic mutations in mtDNA are responsible for mitochondrial diseases. Pronuclear transfer (PNT), not authorized in France, is a technique proposed by the United Kingdom since 2016 to replace the mutated mitochondrial genome of a zygote with a non-mutated one. This method remains widely debated internationally regarding its efficacy and safety. The aim of our work was to evaluate the clinical and and technical feasibility of PNT. Our research confirmed that women carrying a pathogenic variant of mtDNA exhibited ovarian response criteria to stimulation comparable to a control group. Through a sociological study, we also showed that this technique received support from the majority of women surveyed, primarily because it maintains a genetic link between a woman and her child. Subsequently, we developed the PNT technique using triploid zygotes (3PN) donated for research, following authorization from the Biomedicine Agency. Finally, we assessed the relevance of using 3PN and demonstrated their limitations in terms of development and chromosomal status, even when diploidy was restored. This work opens up perspectives on the feasibility and acceptance of PNT. Future research is necessary to explore the safety of this technique
Pangestu, Mulyoto 1963. „Drying biological material for use in assisted reproductive technology“. Monash University, Institute of Reproduction and Development, 2002. http://arrow.monash.edu.au/hdl/1959.1/7879.
Der volle Inhalt der QuelleChang, Jeani. „Relationship Between Assisted Reproductive Technology and Risk of Stillbirth“. ScholarWorks, 2017. https://scholarworks.waldenu.edu/dissertations/4508.
Der volle Inhalt der QuelleSengupta, Anindita. „The Desired Baby: Assisted Reproductive Technology, Secrecy, and a Cultural Account of Family Building in India“. The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1483451149153858.
Der volle Inhalt der QuelleMcComiskey, Mark Henry. „Unrecognised healthcare consequences of children born following assisted reproductive technology“. Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675460.
Der volle Inhalt der QuelleHui, Pui-wah. „Nuchal translucency in pregnancies conceived after assisted reproduction technology“. Click to view the E-thesis via HKUTO, 2003. http://sunzi.lib.hku.hk/hkuto/record/B31971040.
Der volle Inhalt der QuelleHui, Pui-wah, und 許佩華. „Nuchal translucency in pregnancies conceived after assisted reproduction technology“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31971040.
Der volle Inhalt der QuelleEllender, Stacey. „Assisted reproduction defining and evaluating the multiple outcomes of technologically advanced interventions /“. online access from Digital Dissertation Consortium, 2005. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3193097.
Der volle Inhalt der QuelleSmith, Heather K. „The impact of framing on policy passage: the case of assisted reproductive technology“. Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/42774.
Der volle Inhalt der QuelleGoldsmith, Shona. „Population studies of assisted reproductive technology and congenital anomalies in cerebral palsy“. Thesis, The University of Sydney, 2019. https://hdl.handle.net/2123/21909.
Der volle Inhalt der QuelleHoogendijk, Christiaan F. (Christiaan Frederik). „Sperm DNA fragmentation : implications in assisted reproductive technologies“. Thesis, Stellenbosch : Stellenbosch University, 2007. http://hdl.handle.net/10019.1/21626.
Der volle Inhalt der QuelleENGLISH ABSTRACT: Male fertility has for many years been defined in vitro as the ability of sperm to fertilize oocytes and to obtain early cleavage-stage embryos. Spermatozoa comprise of an extraordinary high percentage of polyunsaturated fatty acids in their plasma membrane. Due to an extremely low content of cytoplasm, sperm cells have a particularly low potential to scavenge reactive oxygen species (ROS), and are therefore highly sensitive to oxidative processes, which lead to sperm nucleus DNA damage/fragmentation. Normally, DNA fragmentation occurs in every ejaculate and can be induced by an excessive ROS production of active leukocytes or the spermatozoa themselves. Under distressed conditions, DNA fragmentation may also occur in the testis as a result of oxidative processes in the apoptotic cascade. These DNA fragmentations can be regarded as late signs of programmed cell death (apoptosis). Clinically, DNA fragmentation in spermatozoa results in significantly decreased implantation and pregnancy rates especially in patients with oligo- and/or teratozoospermia. The p-pattern normal sperm morphology has been shown to give poorer fertilization rates in vitro than the g- and n-patterns. In this study there is reported on the significant correlation found between the p-pattern normal sperm morphology and sperm DNA fragmentation as measured with the terminal deoxynucleotidyl transferase-mediated dUDP-biotin end labeling (TUNEL) assay. This finding further explains the lower fertility potential of patients presenting with p-pattern normal sperm morphology. In addition, this study explores the intricate relations between ROS in the semen, DNA fragmentation of the spermatozoa, as measured with the TUNEL assay and the sperm chromatin structure assay (SCSA ), spermatozoa apoptotic status and sperm parameters as measured with a standard semen analysis. Positive correlations were found between ROS and the apoptotic status of the sperm, as well as between sperm with non-fragmented DNA and sperm concentration and percentage motility. The results emphasize the importance of sperm selection especially when the treatment of choice is intracytoplasmic sperm injection (ICSI). An early sign of programmed cell death, also known as apoptosis, is the externalization of phosphatidylserine (PS) from the inner membrane leaflet to the outer leaflet. PS shows a high affinity to Annexin V. Apoptotic spermatozoa are able to fertilize oocytes, but embryo senescence may occur at the time when the paternal genes are activated. In this study there is reported on a novel method whereby spermatozoa can be separated on the basis of their apoptotic status through flow cytometry. Results showed that the normal sperm morphology, according to strict criteria, of the resultant nonapoptotic sperm fraction is significantly higher than that of the apoptotic counterpart. With refinement of this technique, it will be possible in future to use these separated non-apoptotic sperm cells during ICSI for fertilization. From the above it is apparent that the spermatozoon has to play a vital role in the development of the embryo from fertilization to implantation and pregnancy. It is, however, important to note that besides the gametes, there are other critical factors which contribute to a successful in vitro fertilization (IVF) cycle, among these are the in vitro culture conditions. In this regard, this study compared two sequential embryo culture systems. It was found that the more complex medium resulted in better day three embryo quality and a better blastocyst formation rate and pregnancy rate. These findings highlight the importance of a holistic perspective towards the complexity of the factors involved in affecting embryo quality and pregnancy outcome.
AFRIKAANSE OPSOMMING: Manlike fertiliteit is vir baie jare gedefinieer as die in vitro vermoë van ‘n spermsel om ‘n eiersel te bevrug om sodoende embrios te verkry. Die spermsel se plasmamembraan bestaan uit ‘n hoë persentasie poli-onversadigde vetsure. As gevolg van die klein hoeveelhede sitoplasma van die spermsel het dit ‘n beperkte weerstand teen reaktiewe suurstof spesies (ROS) en is gevolglik baie sensitief vir oksidasie. Oksidasie lei tot DNS skade/fragmentasie. DNS fragmentasie kom in spermselle van alle ejakulate voor en is gewoonlik die gevolg van ROS produksie deur die leukosiete in die semen of vanaf die spermselle self. Onder sekere omstandighede kan DNS fragmentasie ook voorkom in die testis waar dit deel vorm van apoptose. Hierdie tipe DNS skade word gesien as laat tekens van geprogrammeerde seldood (apoptose). In oligo- en/of teratozoospermiese mans lei DNS fragmentasie tot verlaagde implantasie- en swangerskapssyfers. Die p-patroon normale sperm morfologie groep gee laer in vitro bevrugting en swangerskapsyfers as die g- en n-patrone. In hierdie studie doen ons verslag oor die statisties betekenisvolle korrelasie wat gevind is tussen die p-patroon normale sperm morfologie en DNS fragmentasie soos gemeet met die ‘terminal deoxynucleotidyl transferase-mediated dUDP-biotin end labeling’ of te wel TUNEL toets. Hierdie bevinding is ‘n verdere verklaring vir die laer fertiliteits potensiaal van pasiënte wat voordoen met p-patroon sperm morfologie. ‘n Verdere doel van die studie was om die moontlike verband tussen ROS in die semen, spermatozoa DNS fragmentasie, apoptotiese status van die sperms en die motiliteits parameters van die spermatozoa te bepaal. ‘n Positiewe korrelasie is gevind tussen ROS en sperm apoptotiese status. Sperms met ongeframenteerde DNS is ook positief gekorreleer met sperm konsentrasie en motiliteit. Die resultate beklemtoon die belangrikheid van spermseleksie veral in pasiënte waar die keuse van behandeling intrasitoplasmiese sperm inspuiting (ICSI) is. ‘n Vroeë teken van apoptose is die eksternalisering van ‘phosphatidylserine’ (PS) vanaf die interne oppervlakte van die plasmamembraan na die eksterne oppervlak. PS het ‘n hoë affiniteit vir Annexin V. Apoptotiese sperms het die vermoë om ‘n oösiet te bevrug, maar kan lei tot die staking van embrio deling wanneer die vaderlike gene ‘n rol begin speel in embrio ontwikkeling. In hierdie studie het ons ‘n nuwe metode ontwikkel waarvolgens die spermatozoa in die ejakulaat op grond van hul apoptotiese status geskei kan word in apoptotiese en nie-apoptotiese fraksies. Die normale sperm morfologie van die nie-apoptotiese fraksie is betekenisvol beter as dié van die apoptotiese fraksie. Verdere verfyning van die tegniek kan daartoe lei dat dit in die toekoms toegepas kan word om vir nie-apoptotiese sperms te selekteer veral voor die uitvoering van ICSI. Uit die bogenoemde is dit duidelik dat die spermsel ‘n baie belangrike rol in die ontwikkeling van ‘n embrio, vanaf bevrugting tot implantasie en swangerskap, speel. Dit is egter ook belangrik om in gedagte te hou dat daar ander bydraende faktore tot ‘n suksesvolle in vitro swangerskap is, soos laboratorium toestande en embrio kultuursisteem. Om hierdie rede is daar ook twee kultuurmedia in hierdie studie vergelyk. Daar is bevind dat die meer komplekse medium beter kwaliteit embrios op dag drie lewer, asook meer blastosiste en ‘n hoër swangerskapsyfer. Dit is dus duidelik dat dit uiters belangrik is om ‘n holistiese perspektief te hê op die komplekse faktore wat ‘n invloed mag hê op bevrugting, embrio kwaliteit asook die swangerskapsyfer.
Evbuomwan, I. O. „Osmoregulation in ovarian hyperstimulation syndrome (OHSS)“. Thesis, University of Newcastle upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246609.
Der volle Inhalt der QuelleGibson, Andrew Robert. „The impact of the child welfare principle on access to assisted reproductive technology“. Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6716/.
Der volle Inhalt der QuelleDavidson, Lien M. „Infra-red laser applications in the reproductive sciences : improving safety for assisted reproductive technology and developing novel research tools“. Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:7472f917-7bf2-4a5d-81e1-16b179cfd0f6.
Der volle Inhalt der QuelleMorris, Akilah. „KNOWLEDGE, INTENTIONS, AND BELIEFS ABOUT FERTILITY AND ASSISTED REPRODUCTIVE TECHNOLOGY AMONG ILLINOIS COLLEGE STUDENTS“. OpenSIUC, 2018. https://opensiuc.lib.siu.edu/dissertations/1595.
Der volle Inhalt der QuelleWong, Yim-kuk Aileen. „Stress and coping for women from infertility to assisted reproductive treatments /“. Hong Kong : University of Hong Kong, 2000. http://sunzi.lib.hku.hk/hkuto/record.jsp?B22331529.
Der volle Inhalt der QuelleSantos, Gomes Barbara Micaela. „Development of novel tools for assisted reproductive technologies based on electrically switchable surfaces“. Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8690/.
Der volle Inhalt der QuelleYelumalai, Suseela. „Potential effects of assisted reproductive technology upon the abundance and localisation of two vital sperm proteins“. Thesis, University of Oxford, 2015. http://ora.ox.ac.uk/objects/uuid:be57f123-c6dc-4cc8-ae53-1f32716cc1e5.
Der volle Inhalt der QuelleBrodin, Thomas. „Ovarian Reserve and Assisted Reproduction“. Doctoral thesis, Uppsala universitet, Obstetrik & gynekologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-192998.
Der volle Inhalt der QuelleBailey, Vicki E. „Ethical considerations for Christian couples facing infertility and weighing the possibilities offered by assisted reproductive technology“. Online full text .pdf document, available to Fuller patrons only, 1999. http://www.tren.com.
Der volle Inhalt der QuelleDooley, Brigitte A. „ATTITUDES TOWARD ASSISTED REPRODUCTIVE TECHNOLOGY: THE EFFECTS OF GENDER, RELATIONSHIP STATUS, AGE, AND SEXUAL ORIENTATION“. UKnowledge, 2014. http://uknowledge.uky.edu/hes_etds/11.
Der volle Inhalt der QuelleBoshoff, Gerhardus Marthinus. „Investigating a novel in vitro embryo culture system – The Walking Egg Affordable Assisted Reproductive Technology“. Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/63049.
Der volle Inhalt der QuelleDissertation (MSc)--University of Pretoria, 2017.
Obstetrics and Gynaecology
MSc
Unrestricted
Li, Zhuoyang. „Fertility and pregnancy outcomes following fresh versus frozen-thawed embryo transfer in assisted reproductive technology“. Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/20330.
Der volle Inhalt der QuelleWong, Yim-kuk Aileen, und 黃艷菊. „Stress and coping for women from infertility to assisted reproductive treatments“. Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2000. http://hub.hku.hk/bib/B31250907.
Der volle Inhalt der QuelleHerbert, Danielle. „Fertility and infertility : studies in reproductive epidemiology in Australia“. Thesis, The University of Queensland, 2011. http://espace.library.uq.edu.au/view/UQ:227862.
Der volle Inhalt der QuellePeters, Kathleen, und k. peters@uws edu au. „Misguided hope: a narrative analysis of couples' stories of childlessness despite treatment with assisted reproductive technology“. Flinders University. School of Nursing and Midwifery, 2006. http://catalogue.flinders.edu.au./local/adt/public/adt-SFU20061011.123633.
Der volle Inhalt der QuelleSakian, Sina. „Investigation of methylation and gene expression in placenta of pregnancies conceived by assisted reproductive technology (ART)“. Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/31191.
Der volle Inhalt der QuelleKruger, Theunis Frans. „The role of sperm morphology in assisted reproduction (ART)“. Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71682.
Der volle Inhalt der QuelleCornet, Bartolomé David. „Molecular determinants of human oocyte quality in assisted reproduction“. Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/667566.
Der volle Inhalt der QuelleLa competencia de desarrollo ovocitaria se define como la capacidad del ovocito para mantener el desarrollo embrionario hasta que el embrión activa su propio genoma. Está determinada por los transcritos (ARN codificantes y no codificantes) acumulados durante la maduración de los ovocitos. La falta de transcripción durante la maduración final de los ovocitos sugiere que la regulación de los genes involucrados en este proceso ocurre a nivel postranscripcional. Entre los posibles mecanismos, el “splicing alternativo” del ARN mensajero, podría estar involucrado. El objetivo principal de esta tesis es explorar nuevas posibilidades para la identificación de biomarcadores de calidad de ovocitos a nivel molecular con el fin de comprender mejor el ovocito y cómo se puede mejorar su competencia de desarrollo. Además, para identificar biomarcadores no invasivos de la competencia de desarrollo de ovocitos, se ha evaluado la expresión de diferentes marcadores de envejecimiento somático en células de cúmulos humanos que rodean los ovocitos, y se ha correlacionado con la edad y la reserva ovárica de las mujeres y con las tasas de maduración de los ovocitos. Finalmente, debido a que muchos de los ovocitos utilizados estaban vitrificados, se ha analizado el efecto de la vitrificación sobre la competencia de desarrollo de los ovocitos comparando los resultados reproductivos de ovocitos frescos y vitrificados del mismo ciclo de estimulación. Los resultados sugieren que los ARNs no codificantes y el splicing alternativo representan un papel importante en el proceso de adquisición de la competencia de desarrollo en ovocitos humanos. Estos resultados pueden proporcionar información valiosa para la búsqueda de marcadores de calidad de ovocitos y para la (re)-interpretación de conjuntos de datos existentes. El estudio de la expresión de marcadores de envejecimiento somático en células de cúmulos humanos no ha mostrado una clara correlación entre los genes analizados y la edad, lo que sugiere que las células del cúmulo de mujeres de edad reproductiva avanzada no presentan el transcriptoma típico de los tejidos envejecidos. Finalmente, este estudio ha demostrado que la vitrificación de ovocitos mantiene per se el potencial de desarrollo de los ovocitos humanos dentro de un rango biológico razonable, clínicamente comparable a los ovocitos frescos.
Fasano, Giovanna. „Contribution of vitrification to human assisted reproduction“. Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209484.
Der volle Inhalt der QuelleMalgré le fait que la cryopréservation soit une technique très attractive, elle peut avoir des effets délétères sur les cellules. Les protocoles expérimentaux visent donc à minimiser ces effets afin d’augmenter la survie et la compétence cellulaire après décongélation.
Les deux méthodes les plus utilisées, la congélation lente et la vitrification, présentent chacune des avantages et des inconvénients. En effet, la première ne permet pas d’éliminer la cristallisation intracellulaire. Quant à la seconde, elle empêche la formation de cristaux de glace mais pourrait provoquer une toxicité due à la forte concentration des cryoprotecteurs.
Cette thèse de doctorat propose plusieurs objectifs :
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Doctorat en Sciences biomédicales et pharmaceutiques
info:eu-repo/semantics/nonPublished
Salah, Wed Mohammed K. „Impact of Assisted Reproductive Technology on the Expression of Epigenetic Marker Histone 3 Lysine 9 in Zygotes“. Thesis, The University of Sydney, 2022. https://hdl.handle.net/2123/29256.
Der volle Inhalt der QuelleValenzuela, Alcaraz Brenda I. „Cardiovascular assessment in fetuses and children conceived by assisted reproductive technologies“. Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/401805.
Der volle Inhalt der QuelleINTRODUCCION: Aproximadamente, 5 millones de niños han nacido en el mundo gracias al uso de las tecnicas de reproduccion asistida (TRA). La mayoría de éstos niños son sanos al nacer; pero diversos estudios mencionan la presencia de peores resultados perinatales en esta población; los cuáles podrían tener consecuencias a largo plazo de acuerdo con la teoría de la programación fetal. Estas técnicas son relativamente nuevas, por lo que sus efectos en la vida adulta aún son desconocidos. La hipótesis principal de ésta tesis es que los fetos concebidos mediante TRA, presentan peores resultados perinatales que aquellos concebidos de manera espontánea (CE), junto con la presencia de cambios cardíacos morfológicos y funcionales que persisten de manera postnatal y que condicionaría un incremento del riesgo cardiovascular en la vida adulta. METODOS: Se llevó a cabo la evaluación cardiovascular morfológica y funcional de fetos únicos y gemelares concebidos por TRA comparados con fetos CE; junto con la presencia de resultados perinatales adversos. Se realiza un seguimiento y evaluación cardiovascular de dichas cohortes hasta la infancia. RESULTADOS: Los fetos TRA presentaron cambios al comparlos con los CE: aurículas más grandes, ventrículos más cortos junto con un menor índice de esfericidad así como paredes engrosadas. presentaron función sistólica disminuída de acuerdo con las mediciones de Doppler tisular y modo-M; también signos de disfunción diastólica demostrado por IRT alargados y disminución del tiempo de deceleración de la onda E. Todos estos cambios fueron independientes de la presencia de fetos pequeños para la edad gestacional (PEG), ya que dichos grupos presentaron fenotipos cardiacos diferentes. En la infancia, los niños TRA mostraron persistencia de dichos cambios cardíacos morfológicos y funcionales subclínicos, junto con remodelado vascular (presion arterial más alta y paredes engrosadas de la intima media de las carótidas). CONCLUSIONES: Las mujeres infértiles presentan resultados perinatales adversos independiente de el método de TRA usado. Los fetos concebidos mediante TRA presentan remodelado cardiovascular el cuál persiste postnatalmente en la infancia. Dichos cambios fueron independientes de la presencia de PEG. Estos hallazgos deben ser tomados en cuentra en futuros estudios del incremento de riesgo cardiovascular en la vida adulta de ésta población.
Hultling, Claes. „Assisted reproduction technology in men with ejaculatory dysfunction with special reference to spinal cord injury /“. Stockholm, 1998. http://diss.kib.ki.se/1998/91-628-2806-1/.
Der volle Inhalt der QuelleMumford, Karen Rose. „The Stress Response, Psychoeducational Interventions and Assisted Reproduction Technology Treatment Outcomes: A Meta-Analytic Review“. [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000495.
Der volle Inhalt der QuelleWunderlin, Beverly J. „The Regulation of Medically Assisted Procreation in Europe and Related Nations and the Influence of National Identity, Social Cultural, and Demographic Differences“. Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3192/.
Der volle Inhalt der QuelleSenaya, Charles M. „Outcome of assisted reproductive technology in women with poor ovarian response undergoing infertility treatment in the reproductive medicine unit of Groote Schuur hospital: a five-year review“. Master's thesis, Faculty of Health Sciences, 2021. http://hdl.handle.net/11427/34032.
Der volle Inhalt der QuelleSchwarz, Lukas [Verfasser], Oliver G. [Akademischer Betreuer] Schmidt, Oliver G. [Gutachter] Schmidt und Benjamin [Gutachter] Friedrich. „Magnetic Micromotors in Assisted Reproductive Technology / Lukas Schwarz ; Gutachter: Oliver G. Schmidt, Benjamin Friedrich ; Betreuer: Oliver G. Schmidt“. Chemnitz : Technische Universität Chemnitz, 2020. http://d-nb.info/1220943169/34.
Der volle Inhalt der QuelleNOTARSTEFANO, VALENTINA. „Development of new molecular tools for the characterization of human Granulosa cells: new implications for the research on human infertility“. Doctoral thesis, Università Politecnica delle Marche, 2018. http://hdl.handle.net/11566/252927.
Der volle Inhalt der QuelleIn assisted reproductive routine, oocyte selection is based on its morphological features, which seem not to be related to its intrinsic competence. Hence, several efforts have been made to identify markers to be added to the actual evaluation, in particular focusing on the crucial roles of Granulosa cells (GCs) in the follicular microenvironment: production of estradiol and progesterone, regulation of the meiosis steps and the transcriptional activity in the oocyte, production of essential nutrients for the oocyte, and accumulation of secreted metabolites. Hence, the progression through the steps of folliculogenesis heavily relies upon bi-directional interactions between germ cells and the surrounding somatic cells. The study of GCs has shown to be determining to highlight particular features of ovarian mechanisms and folliculogenesis, and also to identify the endogenous and exogenous factors that can impair these delicate processes. In this sense, the main aim of the PhD project was to characterize GCs, applying for the first time Fourier Transform Infrared Microspectroscopy (FTIRM) to develop a method for evaluating the quality of human oocytes. This could represent a new, reliable and objective tool for oocyte quality assessment in assisted reproduction routine. Besides this main topic, the impairment induced by endogenous and exogenous factors on the biochemical composition, metabolism and cellular activity of GCs was also investigated by FTIRM, Raman Microspectroscopy and qPCR, shedding new light on the mechanisms governing folliculogenesis. In particular, the research was focused on the impairment determined by reproductive aging, ovarian endometriosis, and plastic pollutants. The information obtained on GCs contribute to the understanding of the mechanisms of impairment of folliculogenesis, by a multidisciplinary approach made of spectroscopic analysis and qPCR. Thanks to the results, an innovative approach to evaluate oocyte quality by spectral features of GCs was proposed, suggesting the possibility to apply FTIRM as a clinical feasible diagnostic tool in assisted reproduction routine.
Nuojua-Huttunen, S. (Sinikka). „Intrauterine insemination (IUI) treatment in subfertility“. Doctoral thesis, University of Oulu, 1999. http://urn.fi/urn:isbn:9514251717.
Der volle Inhalt der QuelleCouture, Vincent. „Les vases communicants : une ethnographie des services reproductifs transfrontaliers au Canada“. Thèse, Université de Sherbrooke, 2018. http://hdl.handle.net/11143/11862.
Der volle Inhalt der QuelleAbstract : Cross-border reproductive care (CBRC) refers to the movement from one jurisdiction to another of persons or reproductive material as part of assisted reproductive technology (ART) treatment. This phenomenon has been observed in many countries, but the Canadian globalized ART system (or "reproscape") remains understudied empirically. This lack of data undermines the normative development in terms of ART. The aim of this dissertation is to describe and understand the Canadian reproscape in order to support ethical and legal reflection. To achieve this goal, we conducted a multi-site clinical ethnography combining (1) literature reviews, (2) participant and non-participant observation in two fertility clinics (Quebec and Ontario), a gamete importation and distribution agency and a dozen scientific congresses, (3) as well as semi-directed interviews with 45 actors of CBRC: users, medical professionals and intermediaries. The data were analyzed by inductive qualitative analysis assisted by NVivo 11 software. Three dimensions emerge from our results. (1) Regarding the legal and clinical contexts of ART, Canada is characterized by a local mosaic of laws and regulations that paradoxically influence CBRC. The altruistic obligation established by the Assisted Human Reproduction Act (AHRA) plays a predominant role on the reproscape. (2) In terms of the experience of the main actors, the simplicity of CBRC integrated to the clinic, such as the import of semen or oocytes, contrasts with the complexity of journeys abroad for which users often feel constrained. (3) When asked about their ethical perspectives, the actors mentioned four main positions: (a) the respect for their reproductive autonomy, (b) the individual and (c) social risks of CBRC, including the exploitation of egg donors as well as gestational surrogates, and (d) AHRA inconsistencies in its ability to mitigate these risks. Our conclusion is that the Canadian reproscape is characterized, inter alia, by a situation of "reproductive outsourcing." This concept is characterized by an institutional recognition of CBRC combined with a relocation of moral and medical risks outside national borders. The results of our study underline the inextricable local and global nature of ART and how CBRC works as communicating vessels.
Uner, Ozge. „A Study On Social And Affective Dimensions Of The Use Of Assisted Reproduction Technology (art) By Women In Turkey“. Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605229/index.pdf.
Der volle Inhalt der Quellenaturally&rdquo
. The comparison of these two groups will illuminate problematical aspects of assisted reproduction technology. The research will be based on two sets of questionnaires designed for each group of women. In this study, both qualitative and quantitative data were used. These analyses will not only lead us to compare infertile and fertile women&rsquo
s responses and evaluate the consequences of emergent assisted reproduction technology but also to assess its social and emotional impacts.
Dedrick, Elizabeth A. „The politics of being an egg "donor" and shifting notions of reproductive freedom“. [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000286.
Der volle Inhalt der QuelleSmith, Malcolm. „Regulating IVF and pre-implantation tissue-typing for the creation of "saviour siblings" : a harm analysis“. Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/35798/1/Malcolm_Smith_Thesis.pdf.
Der volle Inhalt der QuelleKirsch, Juliane Katharina [Verfasser]. „Bedeutung von AMH in Follikelflüssigkeit und Serum bei Behandlung von Patientinnen im Rahmen eines ART-Programmes (Assisted Reproductive Technology) / Juliane Katharina Kirsch“. Kiel : Universitätsbibliothek Kiel, 2018. http://d-nb.info/1161729496/34.
Der volle Inhalt der QuelleSantoso, Benedicta. „The effect of sperm apoptosis, Reactive Oxygen Species (ROS) and semen sample handling on sperm parameters and Assisted Reproductive Technology (ART) outcomes“. Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2020. https://ro.ecu.edu.au/theses/2373.
Der volle Inhalt der QuelleBurger, Riana. „Evaluation of spermatozoa DNA tests for an assisted reproductive techniques (ART) program : correlation with semen parameters and ART outcome“. Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80343.
Der volle Inhalt der QuelleENGLISH ABSTRACT: CHAPTER 1 A review of the application of traditional semen parameters for the investigation and diagnosis of male infertility and the role of predictive values in assisted reproductive techniques (ART) is presented. The importance of sperm morphology, with special emphasis on sperm morphology evaluation, is discussed. Also presented is an overview of the physiology of sperm DNA, the process of spermatogenesis, as well as the contribution of the spermatozoon to the embryo. The different causes of sperm DNA damage and techniques to determine DNA damage in spermatozoa are described. A survey is presented of the correlation of sperm DNA with sperm morphology. CHAPTER 2 All the materials and methods applicable to this study are described. Sperm morphology assessment and two different sperm DNA tests, the chromomycin A3 (CMA3) staining test and the terminal deoxynucleotidyl transferase (TdT)-mediated deoxyuridine triphosphate (dUTP) nick-end labelling (TUNEL) assay, are discussed in detail. CHAPTER 3 Results obtained in this study are presented. Results include the prevalence of abnormal sperm DNA and association with sperm morphology, specifically in the p-pattern and g-pattern morphology groups. Further results include the correlation of sperm morphology and sperm DNA with fertilization in vitro, embryo quality and pregnancy outcome. The percentage CMA3 positive spermatozoa (abnormal DNA) and percentage TUNEL positive spermatozoa (abnormal DNA) had a significant negative association with normal sperm morphology. P-pattern and g-pattern morphology groups differed significantly from each other for both CMA3 and TUNEL. A significant positive association between CMA3 and TUNEL was observed. No association between the percentage normal sperm morphology, percentage CMA3 positive spermatozoa and percentage TUNEL positive spermatozoa and IUI pregnancy outcome was observed. A significant negative association between the percentage TUNEL positive spermatozoa and IVF/ICSI pregnancy outcome was established. The percentage CMA3 positive spermatozoa had a significant positive (unexpected) association with IVF/ICSI pregnancy outcome. There was no association between the three variables and IVF/ICSI fertilization rates. A significant positive association between the percentage normal sperm morphology and IVF/ICSI embryo quality was found. There was a significant positive association between the percentage CMA3 positive spermatozoa and IVF/ICSI embryo quality (unexpected). The percentage TUNEL positive spermatozoa and IVF/ICSI embryo quality was negatively associated. CHAPTER 4 Interpretation of the results and future perspectives are discussed. The CMA3 staining test and TUNEL assay has a limited ability to distinguish between the p-pattern and g-pattern morphology groups. P-pattern spermatozoa are more likely to possess poor chromatin packaging and show increased levels of DNA fragmentation, but some p-pattern patients also may have normal DNA and g-pattern patients abnormal DNA. It is recommended that a sperm DNA test should be implemented routinely in andrology laboratories for the clinical diagnosis of sperm DNA damage in patients.
AFRIKAANSE OPSOMMING: HOOFSTUK 1 'n Samevatting wat handel oor die toepassing van tradisionele semen parameters vir die evaluasie en diagnose van manlike infertiliteit, asook die rol van voorspellingswaardes in kunsmatige voortplantingstegnieke word voorgelê. Die belangrikheid van sperm morfologie, met die klem op sperm morfologie evaluering, word ook bespreek. 'n Oorsig van sperm DNS fisiologie, die proses van spermatogenese, sowel as die sperm se bydrae tot die embrio word hier aangebied. Die verskillende oorsake van sperm DNS skade en die tegnieke om sperm DNS skade vas te stel, asook die die korrelasie tussen sperm DNS en sperm morfologie word ook bespreek. HOOFSTUK 2 Alle materiale en metodes wat van toepassing is op hierdie studie word beskryf. Sperm morfologie evaluering en twee verskillende sperm DNS toetse, die chromomycin A3 (CMA3) kleuringstoets en die “terminal deoxynucleotidyl transferase (TdT)-mediated deoxyuridine triphosphate (dUTP) nick-end labelling (TUNEL)" toets, word ook in meer besonderhede aangebied. HOOFSTUK 3 Resultate wat verkry is tydens hierdie studie word hier uiteengesit. Resultate behels die voorkomsyfer van abnormale DNS en die assosiasie met sperm morfologie, spesifiek in die p-patroon en g-patroon. Verdere resultate sluit die korrelasie van sperm morfologie en sperm DNS met bevrugting in vitro, embriokwaliteit en swangerskap uitkomste in. Die persentasie CMA3 positiewe sperme (abnormale DNS) en persentasie TUNEL positiewe sperme (abnormale DNS) het 'n betekenisvolle negatiewe assosiasie met normale sperm morfologie getoon. P-patroon en g-patroon morfologie groepe het betekenisvol van mekaar verskil vir beide CMA3 en TUNEL. 'n Betekenisvolle positiewe assosiasie is tussen CMA3 en TUNEL waargeneem. Geen assosiasie is tussen die persentasie normale sperm morfologie, persentasie CMA3 positiewe sperme en persentasie TUNEL positiewe sperme en IUI swangerskap uitkomste waargeneem nie. 'n Betekenisvolle negatiewe assosiasie is tussen die persentasie TUNEL positiewe sperme en IVB/ICSI swangerskap uitkomste vasgestel. Die persentasie CMA3 positiewe sperme het 'n betekenisvolle positiewe (onverwags) assosiasie met IVB/ICSI swangeskap uitkomste opgewys. Daar was geen assosiasie tussen die drie veranderlikes en IVB/ICSI bevrugting nie. 'n Betekenisvolle positiewe assosiasie is tussen die persentasie normale sperm morfologie en IVB/ICSI embryo kwaliteit waargeneem. Daar was 'n betekenisvolle positiewe assosiasie tussen die persentasie CMA3 positiewe sperme en IVB/ICSI embrio kwaliteit (onverwags). Die persentasie TUNEL positiewe sperme het 'n negatiewe assosiasie met IVB/ICSI embrio kwaliteit getoon. HOOFSTUK 4 Interpretasie van die resultate en toekomstige vooruitsigte is bespreek. Die CMA3 kleuringstoets en TUNEL toets het 'n beperkte vermoë om tussen die p-patroon en g-patroon morfologie groepe te onderskei. P-patroon spermatozoa sal heel waarskynlik oor swakker chromatien verpakking en meer DNS fragmentasie beskik. Sommige p-patroon pasiënte mag egter normale DNS toon, terwyl g-patroon pasiënte abnormale DNS het. Die implementering van 'n sperm DNS toets in andrologie laboratoriums, vir die kliniese diagnose van sperm DNS skade in pasiënte, word aanbeveel.