In Vitro Oocyte Maturation TechniquesOocytesOogenesisEmbryo Culture TechniquesMeiosisCumulus CellsFertilization in VitroCell NucleusParthenogenesisOvarian FollicleOocyte RetrievalMetaphaseFollicular FluidEmbryonic DevelopmentBlastocystMineral OilFertilizationCleavage Stage, OvumSperm-Ovum InteractionsCells, CulturedCattleCulture MediaCytoplasmCell Culture TechniquesFollicle Stimulating HormoneHorsesSwineChorionic GonadotropinEmbryonic and Fetal DevelopmentEmbryo TransferPyruvic AcidOocyte DonationGranulosa CellsXenopus laevisPregnancyProgesteroneTime FactorsXenopusEstradiol