Results 201 to 210 of about 79,942 (242)

P-134 The effect of artificial oocyte activation (AOA) in cases with history of low or no blastocyst rate

Human Reproduction
Does artificial oocyte activation (AOA) improve fertilization rate, blastocyst formation rate, cancellation rate and clinical outcomes in patients with previously low or no blastocyst rate?
M. Karagianni, L. Thivaiou, C. Oraiopoulou, M. Papadopoulou, N. Christoforidis, A. Papatheodorou, A. Chatziparasidou   +6 more
semanticscholar   +1 more source

Artificial oocyte activation to improve reproductive outcomes in couples with various causes of infertility: a retrospective cohort study.

Reproductive Biomedicine Online, 2020
RESEARCH QUESTION Does calcium ionophore treatment of oocytes improve fertilization rate, embryo development and outcomes in specific groups of infertile couples?
Mingrong Lv, Dan Zhang, Xiaojin He, Beili Chen, Qiang Li, Ding Ding, Yan Hao, Rufeng Xue, Dongmei Ji, Weiwei Zou, Huijuan Zou, Ya-Jing Liu, Jianye Wang, Zhaolian Wei, P. Zhou, Yunxia Cao, Zhiguo Zhang   +16 more
semanticscholar   +1 more source

Activation of polyphosphoinositide metabolism at artificial maturation of Patella vulgata oocytes

Developmental Biology, 1992
The metabolism of polyphosphoinositides (PPI) has been investigated during the meiosis reinitiation of the oocytes of a prosobranch mollusk, the limpet Patella vulgata. Meiosis reinitiation which leads to germinal vesicle breakdown (GVBD) and metaphase-1 spindle formation was artificially induced by treating the prophase-blocked oocytes with 10 mM ...
B, Borg, G, De Renzis, P, Payan, B, Ciapa   +3 more
openaire   +2 more sources

Effects of trehalose vitrification and artificial oocyte activation on the development competence of human immature oocytes

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, Tianjuan Wang, Yan Hao, Fazil Panhwar, Zhongrong Chen, Weiwei Zou, Dongmei Ji, Beili Chen, Ping Zhou, Gang Zhao, Yunxia Cao   +10 more
openaire   +2 more sources

Respiration of starfish oocytes during meiosis, fertilization, and artificial activation

Experimental Cell Research, 1974
Abstract Rates of oxygen consumption were measured in oocytes of the starfish Patiria miniata prior to and after the initiation of meiotic maturation in response to 1-methyladenine. No significant change in the rate of respiration was noted until after the completion of meiosis, at which point a two-fold increase in the rate of respiration was ...
openaire   +2 more sources

A Successful Pregnancy and Live Birth after Intracytoplasmic Sperm Injection with Globozoospermic Sperm and Artificial Oocyte Activation

International Journal of Clinical Case Reports and Reviews
Globozoospermia is a rare form of teratozoospermia still challenging the success of Assisted Reproductive Technology (ART). The use of intracytoplasmic sperm injection (ICSI) with artificial oocyte activation (AOA) with an adapted medium containing ...
Sandrine Cuénoud, P. Renard, Caroline Beaudoin-Chabot, Anna Surbone   +3 more
semanticscholar   +1 more source

Culture conditions affect Ca2+ release in artificially activated mouse and human oocytes

Reproduction, Fertility and Development, 2018
Inconsistent fertilisation and pregnancy rates have been reported by different laboratories after application of ionomycin as a clinical method of assisted oocyte activation (AOA) to overcome fertilisation failure. Using both mouse and human oocytes, in the present study we investigated the effects of ionomycin and Ca2+ concentrations on the pattern of
Yuechao, Lu, Davina, Bonte, Minerva, Ferrer-Buitrago, Mina, Popovic, Jitesh, Neupane, Margot, Van der Jeught, Luc, Leybaert, Petra, De Sutter, Björn, Heindryckx   +8 more
openaire   +2 more sources

Artificial Activation of Murine Oocytes Using Strontium to Derive Haploid and Diploid Parthenotes

2022
Parthenogenesis is a common reproductive strategy among lower animals that involves the development of an embryo from an oocyte, without any contribution from spermatozoon. This phenomenon does not occur naturally in placental mammals. However, the mammalian oocytes can be artificially activated in vitro using mechanical, electrical, and chemical ...
Daphne Norma, Crasta, Satish Kumar, Adiga, Nagarajan, Kannan, Guruprasad, Kalthur   +3 more
openaire   +2 more sources

Effect of Artificial Oocyte Activation by Calcium Ionophore on One-Day-Old Unfertilized Oocytes after ICSI

Journal of Mammalian Ova Research, 2015
Abstract: At our clinic, a successfully fertilized human oocyte is defined as one with two polar bodies and two pronuclei (PN) 18 h after ICSI, but when some oocytes do not form PN. Recently, a successful pregnancy and live birth following artificial oocyte activation (AOA; using Ca2+ ionophore) of ICSI-treated one-day-old unfertilized oocytes was ...
Masahiro Sakurai, Shinichi Watanabe, Toyomi Tanaka, Rie Matsunaga, Naoko Yamanaka, Minako Kamihata, Chikako Kani, Akiko Kuwahata, Masanori Ochi, Toshitaka Horiuchi   +9 more
openaire   +1 more source

Conditions for in vitro maturation and artificial activation of ferret oocytes.

Biology of reproduction, 2002
The ferret represents an attractive species for animal modeling of lung diseases because of the similarity between ferret and human lung biology and its relatively small size and short gestation time. In an effort to establish experimental protocols necessary for cloning ferrets, optimized conditions for in vitro maturation and artificial activation of
Ziyi, Li, Qinshi, Jiang, Maryam, Rezaei Sabet, Yulong, Zhang, Teresa C, Ritchie, John F, Engelhardt   +5 more
openaire   +2 more sources