Embryo, MammalianEmbryo, NonmammalianChick EmbryoEmbryo ImplantationBlastocystEmbryonic DevelopmentEmbryo LossEmbryonic and Fetal DevelopmentGene Expression Regulation, DevelopmentalFertilization in VitroCleavage Stage, OvumPregnancyBlastomeresEmbryo DispositionZygoteMorulaZebrafishCryopreservationGastrulaBody PatterningOocytesIn Situ HybridizationCloning, OrganismSingle Embryo TransferMorphogenesisEmbryo ResearchCulture TechniquesPregnancy RateMesodermNuclear Transfer TechniquesEctogenesisEctodermTime FactorsZebrafish ProteinsMolecular Sequence DataSperm Injections, IntracytoplasmicFertilizationSeedsXenopus ProteinsHomeodomain ProteinsFetal ViabilityParthenogenesisTranscription FactorsEndodermDrosophilaSea UrchinsEmbryonic InductionBlastodermBase SequenceRNA, MessengerPreimplantation DiagnosisDrosophila ProteinsAnimals, Genetically ModifiedMicroinjectionsTreatment OutcomeCell DifferentiationPhenotypeSuperovulationMutationNotochordAmino Acid SequenceNervous SystemYolk SacXenopus laevisPregnancy OutcomeChimeraXenopusOvumDrosophila melanogasterSomitesSignal TransductionNeural CrestCattleCulture MediaSpermatozoaMice, Inbred ICRModels, BiologicalFallopian TubesUrochordataQuailDNA-Binding ProteinsCell NucleusReproductionTeratogensPregnancy, MultipleEmbryo Implantation, DelayedMice, Inbred StrainsVitrificationGene ExpressionReproductive TechniquesZona PellucidaCell LineageUterusGestational AgeLive BirthGenes, LethalGerm CellsGastrulationCoturnixInfertility