Luteinizing hormone/human chorionic gonadotropin stimulates progesterone biosynthesis in the corpus luteum by activating cyclic adenosine monophosphate/protein kinase A cascade. Recent studies have shown that cyclic adenosine monophosphate-mediated activation of protein kinase A interacts with the mammalian target of rapamycin signaling pathways. Furthermore, the use of mammalian target of rapa...

Intraperitoneal injection of human chorionic gonadotropin in the rat induces a dose-dependent frequency of ovarian hyperemia. The occurrence of such hyperemia can be inhibited by pre-injection (3 hours) of antisera from rabbits immunized with gonadotropin extracts. It is demonstrated that the retained capacity of gonadotropin to induce hyperemia following antisera injections is greater when the...

background: abnormal oocyte morphology has been associated with the hormonal environment to which the gametes are exposed. objective: 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 metapha...

abstract: introduction & objective: the infertility treatment by using in vitro matured oocyte has many potential applications. it minimizes the risk of ovarian hyper stimulation and is an alternative treatment for women with polycystic ovarian syndrome who may have problems regarding stimulation for ivf. this method may prove important for subjects in need of fertility preservation and also pr...

With the increasing use of gonadotropin releasing hormone antagonist protocols, it has become an option to trigger ovulation with gonadotropin releasing hormone agonist which has several advantages over human chorionic gonadotropin triggering; among those an elimination or reduction in ovarian hyperstimulation syndrome, and a reduction in luteal phase discomfort. Thus, this paper questions the ...

The denaturation of chorionic gonadotropin in 40 per cent aqueous urea solution has been found exceptional with respect to both the heat of activation and entropy of activation, but similar to other protein denaturations when compared on the basis of free energy of activation (1). The low rate (2) of inactivation of mare serum gonadotropin in 40 per cent aqueous urea solution at 37.5”, along wi...

AMA Elsayad A, Khafagy W, ElBassioune et al. preovulatory human chorionic gonadotropin-day serum oestradiol. Menopause Review/Przegląd Menopauzalny. 2023;22(2):83-86. doi:10.5114/pm.2023.127964. APA Elsayad, A., Khafagy, W., ElBassioune, Rady, M., Abdeltawab, & Altoraky, M. (2023). Menopauzalny, 22(2), 83-86. https://doi.org/10.5114/pm.2023.127964 Chicago Ahmed, Wael Walaa Mahmoud Ahmed Muhamma...