Results 181 to 190 of about 17,633 (227)
Reproductive BioMedicine OnlineIs artificial oocyte activation (AOA) effective for patients with unexplained low or no fertilization following IVF/intracytoplasmic sperm injection (ICSI)?All IVF/ICSI cases resulting in total fertilization failure or fertilization rate ≤25% at Ninewells Assisted Conception Unit, Dundee between January 2014 and December 2021 (n = 231) were reviewed ...
Sarah Martins Da Silva Mbchb Dffp Mrcog
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Reproductive BioMedicine Online, 2019
Does artificial oocyte activation improve clinical outcomes for patients at risk of intracytoplasmic sperm injection (ICSI) fertilization failure?In this study, sibling oocytes from patients with previous ICSI failure or severe teratozoospermia were divided equally into two groups, half for artificial oocyte activation (AOA) with ionomycin after ...
Xiaoying Zheng, Ming Li, Lixue Chen
exaly +3 more sources
Does artificial oocyte activation improve clinical outcomes for patients at risk of intracytoplasmic sperm injection (ICSI) fertilization failure?In this study, sibling oocytes from patients with previous ICSI failure or severe teratozoospermia were divided equally into two groups, half for artificial oocyte activation (AOA) with ionomycin after ...
Xiaoying Zheng, Ming Li, Lixue Chen
exaly +3 more sources
Artificial oocyte activation in severe teratozoospermia undergoing intracytoplasmic sperm injection
Fertility and Sterility, 2008To evaluate efficiency of ionomycin on fertilization and cleavage rates, embryo development, and pregnancy rate after intracytoplasmic sperm injection (ICSI) in teratozoospermic patients.Laboratory study.Isfahan fertility and infertility Center, and Royan institute, Tehran, Iran.Eighty-seven couples with male factor etiology (severe teratozoospermia ...
Mohammad-Hossein Nasr-Esfahani +2 more
exaly +3 more sources
Artificial activation of porcine oocytes matured in vitro
Molecular Reproduction and Development, 1991AbstractThese studies were undertaken to understand the biological basis of artificially induced activation of meiotic metaphase II oocytes and to develop a source of oocytes as recipients for cloning by nuclear transfer. In vitro matured porcine oocytes were pulsed with various voltages of electricity and evalulated for pronuclear formation.
R S, Prather +3 more
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Archives of Gynecology and Obstetrics, 2021
To explore whether artificial oocyte activation (AOA) can improve embryo developmental potentiality and pregnancy outcomes for patients with a history of embryo developmental problem.This was a retrospective study and candidate patients with embryo development problems were collected.
Mingru Yin +9 more
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To explore whether artificial oocyte activation (AOA) can improve embryo developmental potentiality and pregnancy outcomes for patients with a history of embryo developmental problem.This was a retrospective study and candidate patients with embryo development problems were collected.
Mingru Yin +9 more
openaire +2 more sources
2022
Against all expectations, the presence of a carefully selected normal spermatozoon does not guarantee oocyte activation/fertilization. In contrast, some ICSI cycles will have to face no or low fertilization in several consecutive cycles. Both sperm- and oocyte-derived problems may account for such a dilemma. In case of physiological activation problems,
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Against all expectations, the presence of a carefully selected normal spermatozoon does not guarantee oocyte activation/fertilization. In contrast, some ICSI cycles will have to face no or low fertilization in several consecutive cycles. Both sperm- and oocyte-derived problems may account for such a dilemma. In case of physiological activation problems,
openaire +1 more source
In vitro maturation and artificial activation of donkey oocytes
Theriogenology, 2011Three media were evaluated for their ability to support in vitro maturation of donkey (Equus asinus) oocytes and their development after parthenogenetic activation. The basal medium for Medium 1 (M1) and Medium 2 (M2) was M199 and DMEM/F12 respectively, whereas, Medium 3 (M3) consisted of equal parts (v/v) of M199 and DMEM/F12.
Gaoping, Zhao +6 more
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Cryobiology, 2017
Sucrose and trehalose are conventional cryoprotectant additives for oocytes and embryos. Ethanol can artificially enhance activation of inseminated mature oocytes. This study aims to investigate whether artificial oocyte activation (AOA) with ethanol can promote the development competence of in vitro matured oocytes.
Zhiguo Zhang +2 more
exaly +3 more sources
Sucrose and trehalose are conventional cryoprotectant additives for oocytes and embryos. Ethanol can artificially enhance activation of inseminated mature oocytes. This study aims to investigate whether artificial oocyte activation (AOA) with ethanol can promote the development competence of in vitro matured oocytes.
Zhiguo Zhang +2 more
exaly +3 more sources
Zygote, 2011
SummaryThe investigation presented in this paper was conducted on the effect of oocytes activation on frozen–thawed human immature oocytes followed byin vitromaturation (IVM). A total of 386 failed-matured oocytes (germinal vesicle (GV) and metaphase I (MI) stages) was randomly divided into two groups: fresh group and vitrification group, GV group and ...
Y, Liu, Y X, Cao, Z G, Zhang, Q, Xing
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SummaryThe investigation presented in this paper was conducted on the effect of oocytes activation on frozen–thawed human immature oocytes followed byin vitromaturation (IVM). A total of 386 failed-matured oocytes (germinal vesicle (GV) and metaphase I (MI) stages) was randomly divided into two groups: fresh group and vitrification group, GV group and ...
Y, Liu, Y X, Cao, Z G, Zhang, Q, Xing
openaire +2 more sources
Human Fertility, 2016
This study aimed to evaluate the effect of artificial oocyte activation (AOA) by calcium ionophore after intracytoplasmic morphologically selected sperm injection (IMSI) on fertilization, cleavage rate and embryo quality. A total of 194 oocytes from 21 cycles from women with a history of low fertilization rate accompanying teratozoospermia were ...
Batu, Aydinuraz +4 more
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This study aimed to evaluate the effect of artificial oocyte activation (AOA) by calcium ionophore after intracytoplasmic morphologically selected sperm injection (IMSI) on fertilization, cleavage rate and embryo quality. A total of 194 oocytes from 21 cycles from women with a history of low fertilization rate accompanying teratozoospermia were ...
Batu, Aydinuraz +4 more
openaire +2 more sources