Πλοήγηση ανά Θέμα "Oocytes"
Αποτελέσματα 1-12 από 12
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The activity of three glycosidases (β-Ν-acetyloglucosaminidase, α-mannosidase, and β-galactosidase) in the follicular fluid and in the maturation medium affects bovine oocyte maturation
(2016)We studied the role of follicular fluid's (FF) glycosidase (α-mannosidase [α-ΜΑΝ], β-Ν-acetyloglucosaminidase [NAGASE], β-galactosidase [β-GAL]) activity during IVM of bovine oocytes. Oocytes were allocated into two groups ... -
Artificial oocyte activation: physiological, pathophysiological and ethical aspects
(2019)Infertile couples with low oocyte yield in combination with abnormal semen parameters may experience intra-cytoplasmic sperm injection (ICSI) failure. An established factor associated with ICSI failure is oocyte activation ... -
COVID-19 and fertility: a virtual reality
(2020)The COVID-19 pandemic is an extraordinary global situation, and all countries have adopted their own strategies to diminish and eliminate the spread of the virus. All measures are in line with the recommendations provided ... -
Developmental competence of heat stressed oocytes from Holstein and Limousine cows matured in vitro
(2021)The negative effects of heat stress on dairy cattle's fertility have been extensively studied, but the relevant knowledge for beef cattle is rather limited. The aims of this study were to investigate the effects of HS ... -
Effects of ghrelin on activation of Akt1 and ERK1/2 pathways during in vitro maturation of bovine oocytes
(2017)The purpose of this study was to investigate the possible molecular pathways through which ghrelin accelerates in vitro oocyte maturation. Bovine cumulus-oocyte complexes (COCs), after 18 or 24 h maturation in the absence ... -
Effects of melatonin treatment on follicular development and oocyte quality in Chios ewes - Short communication
(2009)Follicular development and oocyte quality were assessed by laparoscopic observation and in vitro fertilisation, respectively, in melatonin-treated (Group M) and control (Group C) anoestrous Chios ewes (n = 10 in each group). ... -
Efforts to create an artificial testis: Culture systems of male germ cells under biochemical conditions resembling the seminiferous tubular biochemical environment
(2005)Induction of meiotic and post-meiotic alterations of male germ cells in vitro has been the target of several research efforts since 1960. However, to date, the establishment of an ideal culture system in which spermatogonial ... -
Mild versus conventional ovarian stimulation for poor responders undergoing IVF/ICSI
(2017)Background/Aim: Mild stimulation protocols have been implemented to be offered to subfertile patients who respond poorly to ovarian stimulation. We aimed to compare the efficacy of mild versus conventional gonadotropin-releasing ... -
Oocyte pick-up in juvenile lambs affects neither onset of puberty nor their future fertility
(2006)A study was designed to evaluate whether the time of onset of puberty and fertility of young ewe lambs would be affected by oocyte pick-up conducted in single or repeated sessions during the first months of lambs' live. ... -
SARS-CoV-2 vs. human gametes, embryos and cryopreservation
(2021)The COVID-19 pandemic, caused by the SARS-CoV-2 virus, is an unprecedented global situation, and all countries have adopted their own measurements to mitigate the spread of the virus in the first as well as in the subsequent ... -
Sperm contributions to oocyte activation: more that meets the eye
(2016)It is well known that for successful fertilization, oocyte activation is required, which involves a signal transduction cascade leading to the conversion of the oocyte to a diploid embryo. During oocyte activation, ... -
Transdermal testosterone pretreatment in poor responders undergoing ICSI: A randomized clinical trial
(2016)STUDY QUESTION: Does pretreatment with transdermal testosterone increase the number of cumulus-oocyte complexes (COCs) retrieved by more than 1.5 in poor responders undergoing intracytoplasmic sperm injection (ICSI), using ...