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The aim of this study was to characterize in canine oocytes and cumulus cells the dynamic expression of growth differentiation factor 9 (GDF-9) in relation to meiotic development and cumulus expansion throughout in vitro maturation (IVM). Cumulus oocytes complexes (COCs) from ovaries of adult bitches were cultured intact for IVM during 0, 48, 72, and 96 hours. At 0 hours or after IVM, COCs were divided...
This study was designed to evaluate the effects of the cryopreservation of oocytes obtained from prepubertal calves or adult cows on chromosome organization, spindle morphology, cytoskeleton structures, and the ability of fertilized oocytes to develop to the blastocyst stage. Once in vitro matured (IVM), the oocytes were divided into three groups according to whether they were: (1) left untreated...
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