نتایج جستجو برای: oocyte

تعداد نتایج: 14991  

Journal: :Journal of embryology and experimental morphology 1984
S F Godsave C C Wylie E B Lane B H Anderton

Cytokeratins have previously been shown to exist in the Xenopus oocyte cortex. Using three monoclonal antibodies against cytokeratins, we follow the appearance of cytokeratin-containing filaments, and their changes in distribution during oocyte differentiation and maturation. Cytokeratin-containing filaments are shown to change dramatically in distribution in the oocyte during its ontogeny.

Journal: :Molecular Human Reproduction 2008
Qinglei Li Laurie J. McKenzie Martin M. Matzuk

Prediction and improvement of oocyte competence are two critical issues in assisted reproductive technology to improve infertility therapy. The lack of reliable and objective predictors of oocyte developmental competence for oocyte/embryo selection during in vitro fertilization hampers the effectiveness of this technology. Likewise, the low pregnancy rate resulting from in vitro maturation of h...

Journal: :international journal of reproductive biomedicine 0
mohammad hadi bahadori fatemeh ghasemian mina ramezani zakieh asgari

background: it is important to protect oocytes and embryos from oxidative stress in the culture medium. melatonin has been shown to be a direct free radical scavenger. objective: effect of melatonin during in vitro oocyte maturation, fertilization and embryo development of mouse oocytes was evaluated. materials and methods: oocytes from supper-ovulated mouse were divided to two groups: cumulus ...

Journal: :Development 2004
Takako Iida Mary A Lilly

In Drosophila, a single oocyte develops within a 16-cell germline cyst. Although all 16 cells initiate meiosis and undergo premeiotic S phase, only the oocyte retains its meiotic chromosome configuration and remains in the meiotic cycle. The other 15 cells in the cyst enter the endocycle and develop as polyploid nurse cells. A longstanding goal in the field has been to identify factors that are...

Journal: :Biology of reproduction 2004
Rebecca E Thomas David T Armstrong Robert B Gilchrist

In the growing follicle, communication between the oocyte and its surrounding follicular cells is essential for normal oocyte and follicular development. Maturation of the fully grown oocyte in vivo is associated with the loss of cumulus cell-oocyte gap junctional communication, preventing entry of meiotic-modulating factors such as cAMP into the oocyte. We have previously shown that oocyte and...

آغاز, فرانک, خزاعی, مظفر,

It is now more than three decades since the first live birth from oocyte cryopreservation. At present, oocyte cryopreservation has become a major component of Assisted Reproductive technologies (ART). Across the world, there is an increasing demand, especially for so-called ‘social egg freezing’ that allows women to preserve their fertility in anticipation of age-related fertility d...

2017
Binarwan Halim Hilma Putri Lubis Diana Novia Masithah Thaharuddin

OBJECTIVE To compare the outcomes of embryo development between oval-shaped oocyte as an abnormal morphology oocyte and a normal morphology oocyte in In Vitro Fertilization (IVF). METHODS This study was a comparative analytical study with retrospective approach which lasted from September 2014 until November 2015. For this study, we used secondary data (medical records) from 24 patients submi...

Journal: :iranian journal of basic medical sciences 0
babatunde adebayo kehinde school of medicine, international campus, tehran university of medical sciences, tehran, iran farid abolhassani department of anatomy, school of medicine, tehran university of medical sciences, tehran, iran hossein yazdekhasti department of anatomy, school of medicine, tehran university of medical sciences, tehran, iran niloufar abbasi emergency sections, vali-asr hospital, shahrekord university of medical sciences, borujen, iran leyla heydari department of anatomy, school of medicine, tehran university of medical sciences, tehran, iran erfan daneshi department of anatomy, school of medicine, kurdistan university of medical sciences, sanandaj, iran

objective(s): several researchers have reported the relationship between infertility in male and varicocele for so many years but the implication of varicocele in female patients is remains elusive. here, we aim to examine the effects of unilateral varicose ovarian vein on antioxidant capacity and oocyte quality of rat ovary after the experimental creation of varicocele in female rats. material...

Journal: :acta medica iranica 0
a. mohammadi-rousheh m. h. noori-mooghahi p. pasbakhsh a. abddvahabi m. akbari a. shokrgozar a. sobhani

rate of in vitro maturation of oocytes is one of the challenges of assisted reproductive techniques. in this study we investigated the effects of supplementation of cysteamine on the rate of in vitro maturation of oocytes in two different media. germinal vesicle oocytes were collected from mouse ovary and cultured in two media (tcm199 and meme) with 0, 50, 100, 200, 500 µm/ml cysteamine. number...

Journal: :iranian journal of veterinary research 2006
h. babaei s. n. nematollahi mahani a. kheradmand e. ayen

the purpose of this study was to evaluate the use of glass capillary micropipette (gcm) as a vessel forvitrification of bovine oocytes. cumulus-oocyte complexes (cocs) were obtained from slaughter-house andwashed 5 to 6 times in the washing medium (tcm-199 + 20% fbs) and randomly assigned to treatment andcontrol group. in the first step of vitrification, cocs were exposed to first vitrification...

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