In Vitro Oocyte Maturation TechniquesOocytesEmbryo Culture TechniquesOogenesisOvarian FollicleFertilizationFertilization in VitroMeiosisFollicle Stimulating HormoneEmbryo, MammalianHair FollicleOvumEmbryonic DevelopmentBlastocystSperm-Ovum InteractionsOvaryCumulus CellsSpermatozoaXenopus laevisOocyte DonationEmbryo, NonmammalianOvulationOocyte RetrievalZygoteFollicular FluidPregnancyMicroinjectionsXenopusEmbryo TransferSperm Injections, IntracytoplasmicProgesteroneChorionic GonadotropinCryopreservationCleavage Stage, OvumParthenogenesisMetaphaseZona PellucidaMaturation-Promoting FactorEmbryo ImplantationOvulation InductionProto-Oncogene Proteins c-mosGenes, mosGranulosa CellsEmbryonic and Fetal DevelopmentPregnancy Rate