Oocyte DonationOocytesTissue DonorsFertilization in VitroPregnancy RateCryopreservationPregnancyEmbryo TransferInfertility, FemaleEmbryo, MammalianEmbryo, NonmammalianChick EmbryoBlastocystEmbryo ImplantationBlood DonorsEmbryonic DevelopmentLiving DonorsOogenesisXenopus laevisOocyte RetrievalMeiosisEmbryonic and Fetal DevelopmentCleavage Stage, OvumXenopusIn Vitro Oocyte Maturation TechniquesGene Expression Regulation, DevelopmentalZygoteFertilizationMicroinjectionsBlastomeresEmbryo LossParthenogenesisSperm Injections, IntracytoplasmicMorulaOvumNuclear Transfer TechniquesMetaphaseCumulus CellsMolecular Sequence DataOvarySperm-Ovum InteractionsZona PellucidaSpermatozoaRNA, MessengerEmbryo DispositionZebrafishXenopus ProteinsTime FactorsEctogenesisIn Situ HybridizationCulture TechniquesBase SequenceBody PatterningAmino Acid SequenceGastrulaCell NucleusVitrificationOvulation InductionCloning, OrganismCryoprotective AgentsMaturation-Promoting FactorCattleCytoplasmSuperovulationMorphogenesisSingle Embryo TransferEgg ProteinsEmbryo ResearchFollicular FluidTissue and Organ HarvestingCulture MediaMesodermMutationEmbryo Culture TechniquesDrosophila ProteinsRNA, ComplementaryDrosophilaChorionic GonadotropinZebrafish ProteinsFetal ViabilityOvulationMice, Inbred StrainsEctodermMice, Inbred ICRCloning, MolecularPregnancy OutcomeCell DifferentiationTissue and Organ ProcurementTranscription FactorsMice, Inbred C57BLSwineReproductive TechniquesChimeraCells, CulturedEthylene GlycolGene Expression