نتایج جستجو برای: preantral
تعداد نتایج: 599 فیلتر نتایج به سال:
Follikülogenez mekanizması çeşitli hormonları, büyüme faktörlerini ve sinyal moleküllerini içeren karmaşık bir süreçtir. Foliküler gelişim mekanizmaları üzerine gelecekteki araştırmalar, dişi reprodüktif yaşamı hakkında daha kapsamlı veriler sağlayacaktır. Vitamin D, steroidogenez yoluyla follikülogenezi etkiler. Granüloza hücrelerinde D reseptör sinyali hormon salgılarını steroidojenik enzimle...
objective: in vitro ovarian follicle culture provides a tool to investigate folliculogenesis and may be used as an assisted reproductive technology )art(. this study aims to compare survival and development rates in mouse ovarian follicles after two and three dimensional in vitro cultures. methods: preantral follicles were isolated from the ovaries of 14-day old female mice and cultured in α-m...
introduction: melatonin acts as an indirect antioxidant and is a powerful direct free radical scavenger and direct responses to melatonin in the gonads are detected. this study aims to investigate the influence of different doses of melatonin on preantral follicle development and oogenesis of in vitro cultured mouse ovarian follicles. materials and methods: preantral follicles with diameters of...
CONTEXT Previous studies showed that nerve growth factor (NGF) induces the expression of functional FSH receptors (FSHR) in preantral follicles of the developing rat ovary. OBJECTIVE The objective of this study was to determine whether NGF can affect granulosa cell (GC) function in human periovulatory follicles using intact human ovaries and isolated human GCs. PATIENTS AND INTERVENTIONS Hu...
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,...
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