Purpose The aim of the study was to evidence whether Thyrotropin (TSH) and Thyroid hormones (T3 and T4) have an impact in in vitro follicle growth of mouse preantral follicles, in in vitro fertilization and in early embryo development. Methods This prospective observational animal experimental study was conducted on a study population consisted of 100 female and 30 male mice (C57BL/6 x CBA) F1 ...

STUDY QUESTION What are the effects of exposure of ovarian tissue to dehydroepiandrosterone (DHEA) supplementation in vivo? SUMMARY ANSWER DHEA exposure stimulates initiation of primordial follicles and development of gonadotrophin-responsive preantral/early antral follicles possibly mediated through promoting granulosa cell proliferation and enhancing anti-Mullerian hormone (AMH) expression....

To compare the efficiency of North Carolina State University medium 23 (NCSU23) and Alpha Minimum Essential Medium (?-MEM) as a base medium, to evaluate effects Anti-Müllerian Hormone (AMH) alone or in combination with Follicle Stimulating (FSH) on vitro development steroid production isolated porcine preantral follicles. Porcine secondary follicles were cultured NCSU23 ?-MEM media for 4 days. ...

Background: The majority of thousands of oocytes in the ovaries are small, non-growing and reside in preantral follicles (PFs). The development of a culture system for preantral follicle may be very useful for understanding the complex mechanism in folliculogenesis at early stages of development as wells as could offer a significant way for the propagation of livestock, including goats. This pa...

Gap junction communication plays an essential role in follicle growth. Immunocytochemistry and confocal microscopy were used to examine the expression of gap junction connexins of the alpha and beta subfamilies in follicles from primordial to preovulatory stages in the ovaries of prepubertal and adult mice. Connexin-specific antibodies detected alpha(1), alpha(4), alpha(6), beta(1), beta(2) and...

The dimeric glycoprotein anti-Müllerian hormone (AMH) is a member of the transforming growth factor-beta superfamily of growth and differentiation factors. During male fetal sex differentiation, AMH is produced by Sertoli cells and induces degeneration of the Müllerian ducts, which form the anlagen of part of the internal female genital system. In females, AMH is produced by the ovary, but only...

BACKGROUND We found previously that the expression of SET gene was up-regulated in polycystic ovaries. Evidences suggested that SET protein was essential for regulating both the promoter activity of CYP17A1 and the biological activity of P450c17. In this study, we explored whether SET regulated androgen production in preantral follicles. METHODS The mouse preantral follicles were cultured in ...

This study was conducted to examine follicle growth and intra-ovarian oocyte release in rabbit ovaries influenced by a local application of prostaglandin formation inhibitors. While five rabbits remained as unstimulated controls, twenty-seven mature rabbits were hyperstimulated by pure follicle stimulating hormone (FSH) followed by human chorionic gonadotropin (hCG) at time 0. At the same time,...