Ultrastructural changes in the theca interna during follicular atresia in sheep
نویسندگان
چکیده
منابع مشابه
the effect of e-64 on the developmental competence of sheep cocs during in vitro maturation
in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.
Transcriptome Profiling of the Theca Interna from Bovine Ovarian Follicles during Atresia
The theca interna is a specialized stromal layer that envelops each growing ovarian follicle. It contains capillaries, fibroblasts, immune cells and the steroidogenic cells that synthesize androgens for conversion to estradiol by the neighboring granulosa cells. During reproductive life only a small number of follicles will grow to a sufficient size to ovulate, whereas the majority of follicles...
متن کاملThecal vasculature and oocyte maturation during follicular atresia in the sheep and pig.
During follicular atresia in the sheep and pig there is a marked reduction in the vasculature of the theca interna underlying the membrana granulosa. In the sheep there is no reduction of thecal blood vessels adjacent to the cumulus which remains viable. By contrast, in the pig the cumulus degenerates during atresia and the underlying thecal vasculature is greatly diminished. However, despite l...
متن کاملInsulin Receptor Expression in Follicular and Compartments of the Human Ovary over the Follicular Growth, Regression and Atresia Stromal Course of
The cytologic localization and cellular levels of insulin receptors in the human ovary during follicular growth, regression and atresia were examined by the avidin/biotin immunoperoxidase techniques with a monoclonal antibody to insulin receptor. In primordial follicles, only the oocyte showed a weak immunostaining for insulin receptor, whereas the stromal cells surrounding primordial follicles...
متن کاملUltrastructural Changes of Sheep Oocytes Follow Vitrification by Different Methods and In Vitro Maturation
Purpose: Our aim was determination of the sheep oocytes ultrastructural changes follow vitrification and in vitro maturation. Materials and Methods: Good quality isolated cumulus-oocyte complexes (COCs) were randomly divided into non-vitrified control, conventional straw, cryotop and solid surface vitrification groups. In the conventional and cryotop methods the vitrified COCs were plunged dire...
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ژورنال
عنوان ژورنال: Reproduction
سال: 1978
ISSN: 1470-1626,1741-7899
DOI: 10.1530/jrf.0.0540183