In Vitro Oocyte Maturation TechniquesOocytesOogenesisEmbryo Culture TechniquesFertilization in VitroFertilizationSperm Injections, IntracytoplasmicSpermatozoaFollicular FluidOvarian FollicleMeiosisOocyte RetrievalPregnancyStarfishOvumMaturation-Promoting FactorSperm-Ovum InteractionsEmbryo TransferCumulus CellsEmbryonic DevelopmentOocyte DonationXenopus laevisCryopreservationBlastocystMetaphaseMicroinjectionsXenopusParthenogenesisChorionic GonadotropinOvulation InductionOvaryInfertility, FemaleZona PellucidaPregnancy RateZygoteProto-Oncogene Proteins c-mosGenes, mos