منابع مشابه
I-14: Vitrification of Human Immature Oocytes in IVM Program
The cryopreservation of immature GV oocytes by vitrification is offering attractive perspectives, since they represent an important pool of germ cells for women undergoing IVM cycles, or at risk of infertility for OHSS or PCOs, particularly those poor responders to gonadotropin stimulation, or in case of cancer. Therefore, it becomes necessary to optimize both cryopreservation technique as well...
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Previous work indicated that immature oocytes of Xenopus were incapable of assembling microtubules but that competence was achieved during maturation. We report here that small numbers of microtubules do exist in immature oocytes. Consistent with this finding, ultrastructural observations indicate that brain microtubules injected into immature oocytes persist in large numbers for at least 30 mi...
متن کاملUltrastructural aspects of human immature oocytes
In vitro fertilization, one of assisted reproduction`s technique is, for some couples, the only possibility to conceive a child. One of the main condition that must be fulfield in order to reach this goal is the quality of human oocytes. The ovarian stimulation protocols used have as an important goal the oocytes quality. The maturity grade of the oocytes is a good indicator of their quality.Th...
متن کاملStudies on Guinea Pig Oocytes
Oocytes in primordial and primary follicles of young adult guinea pig ovaries fixed in osmium tetroxide and embedded in Epon 812, have been observed by electron microscopy. The gradual differentiation of a series of cytoplasmic organelles has been correlated with the growth in size of the oocyte and the development of the follicular wall. The most immature primordial oocyte is morphologically a...
متن کاملIn Vitro Growing Immature Porcine Oocytes
Porcine ovaries contain a large number of oocytes at different stages of growth, most of which degenerate either before or at various stages of growth. To utilize those potential female gametes stored in the ovary, it is important to develop culture system that can provide a suitable alternative environment for oocytes to achieve full growth and competences to undergo meiotic maturation, fertil...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1986
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0770425