نتایج جستجو برای: germinal vesicle oocyte
تعداد نتایج: 63218 فیلتر نتایج به سال:
Background: This study was carried out to evaluate the pattern of reactive oxygen species (ROS) variations during in vitro oocyte maturation and embryo development in sheep, and to investigate whether embryo culture condition and the presence of cell-permeable superoxide dismutase mimetic [Manganese (III) meso-tetrakis (4-benzoic acid) porphyrin (MnTBAP)] can influence ROS pattern. Materials an...
background: oocyte cryopreservation is one of the most important topics in the field of assisted reproductive technology to preserve women fertility, but relationship between cryopreservation and apoptosis is still a matter of debate. the present study was aimed to investigate the effects of vitrification on apoptosis in mouse oocytes by cryotop method. method: a total of 200 germinal vesicle (...
Histological examination of gonadotrophin stimulated Macaca fascicularis ovaries removed at mid-follicular phase showed that germinal vesicles (GV) could exhibit different configurations in follicles greater than 1000 microns in diameter. We describe 3 types of nuclear organization called GV1 (dispersed and filamentous chromatin), GV2 (clumped and filamentous chromatin) and GV3 (perinucleolar c...
It is known that amphibian oocytes undergo maturation through the formation and activation of maturation-promoting factor (MPF) in response to stimulation by the maturation-inducing hormone progesterone; however, the signal transduction pathway that links the hormonal stimulation on the oocyte surface to the activation of MPF in the oocyte cytoplasm remains a mystery. The aim of this study was ...
Objective The objective of this study was to evaluate LH/FSH and demographic variables on maturation stage of oocytes in patients with polycystic ovary syndrome (PCOS) with or without insulin resistance. MaterialsAndMethods Sixty patients with IVF/ICSI indication were subdivided into 3 groups as follow: 20 subjects were assigned to control (fertile women with male infertility history) group, 20...
Background: Follicular fluid (FF) plays a key role in preparing a microenvironment for the development and fertilization of oocytes. Moreover, biochemical and hormonal changes in the FF surrounding the oocyte can affect its quality and successful fertilization. The present study was conducted to investigate the relationship of beta human chorionic gonadotropin (beta-HCG) and anti-mullerian horm...
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