نتایج جستجو برای: in vitro maturation techniques
تعداد نتایج: 17042947 فیلتر نتایج به سال:
Introduction: In vitro maturation (IVM) of oocytes, providing oocytes maturation out of normal conditions, is an appropriate infertility treatment system, though the clinical use of IVM is limited due to low rate of success. Accordingly, this study aimed to analyze the effect of fibroblast growth factor on in vitro maturation of immature oocytes. Methods: Immature oocytes of 20 female mice of...
background: mammalian oocytes are exposed to a mixture of many different growth factors and cytokines which provides an optimized microenvironment for oocyte maturation. in the lack of this natural microenvironment in vitro the quality of oocyte and embryos appears to be suboptimal. objective: this study was undertaken to investigate the effects of egf and lif on in vitro maturation fertilizati...
as far as bandura’s (1977) conceptualization of the sense of self-efficacy is concerned, it is argued to be context- and even task-specific, compared to other concepts like self-esteem (brown, 2000); therefore, upon the previous research studies, related theories and definitions, and the ideas and views obtained from the interviews conducted with the scholars, the current research study aimed a...
روشهای شیمی درمانی و رادیوتراپی رایج در درمان بیماری سرطان اغلب باعث از دست رفتن قدرت باروری وآسیبهای جدی به بافت تخمدان می شود.ازجمله اقدامات بالینی دردرمان بیماران سرطانی (سرطان تخمدان ، سینه یا رحم)،و بیمارانی که دچار مشکل تولیدمثلی می باشند پیوند بافت تخمدان درون عضله یا قسمتی از کپسول کلیه و یا زیر صفاق،برای بازگشت باروری آنها می باشد. از بحثهای بسیار مهم و اساسی مطرح در این روش،ایســکمی ا...
Background: Oocyte in vitro maturation success rate is still low in compareision to oocyte in vivo maturation. Thus prediction and improvement of oocyte competency are two critical issues in assisted reproductive technology. New insights into oocyte-cumulus cell regulatory loop may assist our optimization of in vitro maturation technique. Maturation and developmental competency of cumulus oocyt...
Several discoveries have been described recently (5-10 years) about the biology of ovarian follicles (oocyte, cumulus cells and granulosa cells), including new aspects of cellular communication, the control of oocyte maturation and the acquisition of oocyte competence for fertilization and further embryo development. These advances are nourishing assisted reproduction techniques (ART) with new ...
Purpose: This Study evaluated the resumption of meiosis, in vitro maturtion and department of immature mouse oocytes with b- mercaptothanol. Materials and methods: Immature oocytes were recovered from NMRI mouse strain (4-6 weeks) in different 4 experiments groups: the control group, the oocytes were matured in MEM-a+ medium containing + FCS 55%; group 1: the oocytes were matured in MEM- a med...
background: in general, 15% of oocytes collected in art cycles are immature. these oocytes may be cryopreserved further for use in in-vitro maturation (ivm) program. objective: the aim of this study was to determine maturation capacity, morphometric parameters and morphology of human immature oocytes in both fresh ivm (fivm) and vitrified-ivm (vivm) oocytes. materials and methods: 93 women who ...
background: ammonium is produced in culture medium due to amino acids degradation and has adverse effect on in vitro culture of embryo. in the current study, the purpose was to evaluate the effects of ammuniom chloride (ac) on in vitro oocyte maturation rate and early embryo development in the sheep and its effect on the expression of bcl-2. methods: in vitro maturation (ivm) was performed in t...
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