In Vitro Oocyte Maturation TechniquesOocytesOogenesisEmbryo Culture TechniquesFertilizationFertilization in VitroMeiosisCumulus CellsOvumXenopus laevisGenes, mosSperm-Ovum InteractionsMaturation-Promoting FactorProto-Oncogene Proteins c-mosOvarian FollicleEmbryonic DevelopmentXenopusMicroinjectionsSpermatozoaMetaphaseOvaryBlastocystOocyte DonationStarfishOocyte RetrievalHydroxyprogesteronesChorionic GonadotropinEmbryo TransferParthenogenesisProgesteroneZygoteOvulationSperm Injections, IntracytoplasmicPregnancyFollicular FluidZona PellucidaXenopus ProteinsOvulation InductionCleavage Stage, OvumCryopreservation