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...

Nafoxidine hydrochloride (Upjohn, 11100A)injected with oestradiol into immature chicks inhibits the hormone-induced increase in [3H]oestradiol-binding activity in salt extracts of liver nuclei as well as the subsequent production by liver of egg-yolk phosphoprotein. Substantial inhibition of both oestradiol-induced responses is seen when nafoxidine is given in a dose approximately equimolar wit...

There is a paucity of information on the reproductive biology guinea hens. A study was conducted to document postembryonic developmental changes in ovarian histology and associated progesterone 17β-oestradiol profiles until 32 weeks age (WOA). Highly significant increases (p<0.001) were noticed oocyte follicular diameters beyond 16 WOA. Other morphometric traits showed inconsistent The first...

Oestrogens govern reproductive functions in vertebrates, and are present in all animal tissues. The theoretical maximum daily intake (TMDI) of oestradiol-17beta by consumption of cattle meat is calculated to be 4.3 ng. Following the use of oestradiol-containing growth-promoting agents, TMDI is increased by a factor of 4.6 to 20 ng oestradiol-17beta, assuming that single dosage and 'good animal ...

An intravenous injection of 2-fluoro-oestradiol simultaneously with an implantation-inducing dose of oestradiol reduced the number of implantation sites in delayed implanting hypophysectomized rats maintained with progesterone. Administration of 2-fluoro-oestradiol 1 h before or after oestradiol had no effect. Furthermore, injection of as much as 500 ng 2-fluoro-oestradiol 48 h before administr...

OBJECTIVE Oestrogens could be protective against the development of Alzheimer's disease (AD) but reports on oestrogen levels in AD have been conflicting. DESIGN AND METHODS A meta-analysis using robust regression was carried out to assess whether the sensitivity of the assays of past studies had affected the reported level of total oestradiol. We had also measured total oestradiol in women wi...

Transplantation of cryopreserved intact ovaries from cancer patients is a technically challenging option for restoring fertility after sterilizing cancer therapy. In this paper we describe an assay based on 17ß-oestradiol (oestradiol) production, to monitor the functional damage sustained by the ovarian tissue during the freeze/thawing procedure. To this end, fresh bovine ovarian cortical biops...

Premature regression of the corpus luteum, following the first post partum ovulation, is often preceded by sub-optimal preovulatory oestradiol secretion and accompanied by elevated levels of oxytocin receptors early in the luteal phase. We have investigated the role of preovulatory oestradiol in the control of subsequent oxytocin receptor concentration and activity by treating ovariectomised co...

Objective This study aimed to investigate the association between low plasma Platelet-derived growth factor-BB (PDGF-BB) levels and oestradiol in Postmenopausal osteoporosis (PMOP). Methods This prospective study measured plasma PDGF-BB and oestradiol levels in outpatients who were admitted to our hospital. Participants were screened and then allocated to three groups: normal young women, postm...

Adequate endometrial preparation with exogenous steroids is mandatory for successful ovum donation. This study was undertaken to assess the value of endometrial thickness by ultrasound and serum oestradiol as predictors of ovum donation outcome and to analyse the correlation between serum oestradiol concentrations and the endometrial thickness. Endometrial thickness and serum oestradiol concent...