Single Embryo TransferPregnancy, MultipleEmbryo TransferEmbryo, MammalianFertilization in VitroEmbryo ImplantationPregnancy RateTwinsEmbryo, NonmammalianSperm Injections, IntracytoplasmicPregnancyBlastocystChick EmbryoEmbryonic DevelopmentCryopreservationCleavage Stage, OvumReproductive Techniques, AssistedPregnancy OutcomeLive BirthBlastomeresInfertilityEmbryo Culture TechniquesMultiple Birth OffspringPreimplantation DiagnosisBirth RateEmbryo LossEmbryonic and Fetal DevelopmentGene Expression Regulation, DevelopmentalOocytesOvulation InductionMaternal AgeEmbryo DispositionMorulaZygoteZebrafishGastrulaBody PatterningIn Situ HybridizationEmbryo ResearchMorphogenesisCloning, OrganismCulture TechniquesMesodermEctogenesisCost-Benefit AnalysisNuclear Transfer TechniquesEctodermZebrafish ProteinsRetrospective StudiesInfant, NewbornMolecular Sequence DataXenopus ProteinsHomeodomain ProteinsSeedsFetal ViabilityEndodermTranscription FactorsParthenogenesisEmbryonic InductionBlastodermDrosophilaSea UrchinsDrosophila ProteinsRNA, MessengerFertilizationBase SequenceAnimals, Genetically ModifiedMicroinjectionsCell DifferentiationNotochordNervous SystemYolk SacTreatment OutcomeXenopus laevisTime FactorsSuperovulationXenopusChimeraAmino Acid SequenceMutationPhenotypeSomitesNeural CrestOvumDrosophila melanogaster