BACKGROUND Oocyte in vitro maturation (IVM) and cryopreservation at the time of routine ovarian tissue freezing may be offered to cancer patients as an additional option for fertility preservation. This study aimed to investigate the developmental capacity of oocytes isolated from unstimulated ovaries. METHODS Immature oocytes (n = 63) from seven consenting premenopausal patients were analyse...

the aim of this study was to compare the effect of time of parthenogenetic activation (22 hr versus 27 hr after in vitro maturation-ivm) on in vitro development of ovine oocytes using either single (ionomycin 5 ?m for 5 min or ethanol 7% for 7 min) or combined (ionomycin and ethanol with 6-dmap 2 mm for 3 hr) activation treatments. the abattoir-derived in vitro matured activated oocytes were cu...

Little is known about expression of microRNA (miRNA) in bovine oocytes and pre-implantation embryos. These molecules likely have an important role in regulating development. For example, differences in quality of oocytes matured in vivo v. in vitro might be due, in part, to altered miRNA expression. In Experiment 1, in vivo-matured COC were collected by transvaginal aspiration of 7 superstimula...

" Alarm over the rapid progress of embryo research was fuelled by another dramatic development last night. Scientists revealed that they have created 'virgin birth' embryos for the first time in Britain. " Both stories artfully blended competent accounts of actual and potential advances in reproductive technology with scary language and condemnation, magnified by repetition and typography, from...