نتایج جستجو برای: oocytes

تعداد نتایج: 21931  

Background: Currently, a limited number of studies have been done on the vitrification of small ruminant oocytes, especially in sheep, where poor developmental rates are obtained following immature and mature oocyte vitrification. Poor ovine oocyte cryopreservation could attribute to the damage to enzymes which has role in metabolic pathways. Therefore, production of cytokines and growth factor...

Ashourzadeh S Khalili MA Omidi M, Rahimipour M

Background: In vitro maturation (IVM) is a promising treatment option for certain infertile women. Nowadays, with the aid of the Polscope, it has become possible to evaluate zona pellucida (ZP) and spindle as parameters of oocyte quality. The goal was to investigate the relationship between the presence of the meiotic spindle and ZP birefringence with morphology of the in vivo and in vitro matu...

Journal: :دامپزشکی 0
محمدحسن متدین عضو هیأت علمی موسسه تحقیقات واکسن و سرم سازی رازی فاطمه توده دهقان عضو هیأت علمی موسسه تحقیقات واکسن و سرم سازی رازی سوسن حقیقی عضو هیأت علمی موسسه تحقیقات واکسن و سرم سازی رازی

in order to do in vitro fertilization (ivf), 435 oocytes were collected from 20 super ovulated nmri female mice, in m2 media with 4% bsa. 85% (n=370) of collected oocytes were in mii phase. epididymal sperms were added to 332 oocytes in t6 media drops with 4% bsa and incubated. fertilization rate was 79.8% (n=265) out of which 27.5% (n=73) grew to morula and 20.8% (n=55) achieved blastocyst sta...

Journal: :international journal of reproductive biomedicine 0
mehri makki elham saboori mohammad ali sabbaghi raheleh aram mohammad hasan fallahian fatemeh peyghambari

background:   objective: in this study, we supplemented a chemically defined medium with different combinations of selenium, calcium and calcium ionophore concentrations to obtain the best rate of human oocytes maturation, survival, and fertilization.   materials and methods: as an experimental study, three combinations of [selenium (5 μg/ml), calcium (5 μg/ml) and calcium ionophore (1 μg/ml)],...

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...

Gharibi SH Hajian M Hosseini SM Nasr Esfahan MH Ostad Hosseini S

Background: in vitro maturation (IVM) of oocytes has increasing potential applications in assisted reproductive technology (ART), during which germinal vesicle (GV) oocytes cultured in vitro to produce mature (MII arrested) ones. Although functional, IVM oocytes have low developmental competence compared to in vivo matured oocytes; possibly because IVM comprises asynchrony between nuclear and c...

Asgari V, Hajian M Hosseini SM Najarasl M Nasr Esfahani MH, Ostadhosseini S Piryaei A

Background: The present study was carried out to investigate how the interactions between aging, vitrification, and post-warming interval affect the credibility of sheep MII-oocytes for in vitro fertilization (IVF), intracytoplasmic injection (ICSI), and parthenogenetic activation (PA). Materials and Methods: The vitrified-warmed oocytes, either immediately (immediate group: IG) or two hours po...

Asgari V, Farokhi F Kargar S Nasr Esfahani MH,

Background: Cryopreservation of in vitro matured oocytes is a useful technique because the oocytes can be used for some assisted reproductive technologies. On the other hand, the cryopreservation of oocytes is an open problem as a result of their structural sensitivity to the freezing process. The purpose of this study was to evaluate the effect of vitrification on in vitro development of vitri...

Liu Y Tong XH, Wu L

Background: Before human MII oocytes are vitrified they are usually denuded from their cumulus cells. In this study we wanted to investigate the effects of an intact corona radiata on the vitrification and fertilization of human oocytes. Materials and Methods: The study comprised two different parts. In Part 1, 36 MII stage oocytes, from 6 patients, were randomly assigned into a control group, ...

Journal: :journal of basic research in medical sciences 0
hojjat-allah abbaszadeh reza mastery farahani mohsen noorozian maryam sadat khoramgah ardeshir moayeri ali asghar keramati nia

introduction: in vitro maturation and development of immature oocytes, as an artificial reproduction technique, is useful especially in women who are affected by cancer and polycystic ovary syndrome. despite using many types of in vitro media, an appropriate environment has not been reported yet. present study was designed to assess the effect of heated human follicular fluid (hhff), which is s...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید