Oocyte quality and embryo production in cattle
نویسندگان
چکیده
منابع مشابه
Factors influencing oocyte and embryo quality in cattle.
Following in vitro maturation, approximately 90% of immature bovine oocytes will reach metaphase II and extrude the first polar body; approximately 80% will undergo fertilization and cleave, at least once, to the two-cell stage. However, only about 30-40% will ever reach the blastocyst stage. This would suggest that the post-fertilization part of the process of in vitro embryo production, the l...
متن کاملO-24: Increased Homocysteinein PCOS Affects Oocyte and Embryo Quality
Background: The biochemical characteristics of the follicular fluid (FF) play essential role in oocyte quality, the subsequent fertilization potential and embryo development. The oocyte quality and metabolism largely depends on follicular microenvironment. Present study aimed to investigate the relationship between oocyte quality and FF homocysteine (Hcy) level in women undergoing to IVF treatm...
متن کاملGonadotropin Stimulation Regimens and Oocyte Embryo Quality
In the normal human menstrual cycle, the final phase of ovarian folliculogenesis leading upto the pre-ovulatory stage is gonadotropin dependent. Luteinising hormone (LH) acts synergistically with follicle stimulating hormone (FSH) to achieve follicular steroidogenesis, luteinisation and ovulation. It therefore follows that the maturational process of the oocyte contained within the follicle and...
متن کاملO-10: Assessment of Oocyte and Embryo Quality in Different Time between Oocyte Retrieval and hCG Priming
Background: Abnormal oocyte morphology has been associated with the hormonal environment to which the gametes are exposed. In this study, we evaluated the oocytes morphology, fertilization rate, embryos quality, and implantation rate resulted of retrieved oocytes in different times after human chorionic gonadotrophin (hCG) administration. Materials and Methods: A total of 985 metaphase II were ...
متن کاملOrigins and effects of oocyte quality in cattle
Oocyte quality is the resultant of multifactor interactions that should be carefully taken into account either for in vitro embryo production technologies or for studying follicle dynamics. Different approaches may be used to perform an analysis of variables related to oocyte quality which may focus on the ovary, the follicle, the cumulus-oocyte complex and, finally, the oocyte. The information...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1998
ISSN: 0008-3984,1918-1825
DOI: 10.4141/a98-102