Embryo, MammalianBlastocystEmbryo, NonmammalianEmbryonic DevelopmentChick EmbryoEmbryonic and Fetal DevelopmentGene Expression Regulation, DevelopmentalEmbryo ImplantationZygoteCleavage Stage, OvumBlastomeresMorulaPregnancyEmbryo Culture TechniquesCulture TechniquesBody PatterningMammalsEctodermEndodermIn Situ HybridizationFertilization in VitroMorphogenesisMesodermEmbryo LossMolecular Sequence DataYolk SacTranscription FactorsHomeodomain ProteinsOocytesGerm LayersCell DifferentiationMice, Inbred ICRBlastocyst Inner Cell MassMice, Inbred CBAFibroblast Growth Factor 4Base SequenceGastrulaCell LineageRNA, MessengerTotipotent Stem CellsAmino Acid SequenceTrophoblastsSignal TransductionMice, Inbred C57BLNeural CrestTissue SurvivalEmbryonic Stem CellsOctamer Transcription Factor-3EctogenesisDNA-Binding ProteinsCryopreservationGenomic ImprintingMice, TransgenicTime FactorsEmbryo DispositionZebrafishGene ExpressionGestational AgePhenotypeStem CellsCloning, OrganismMice, KnockoutCattleModels, BiologicalMice, Inbred StrainsNuclear Transfer TechniquesFetal ViabilityMutationCells, CulturedImmunohistochemistryParthenogenesisZebrafish ProteinsCell LineEmbryo ResearchSingle Embryo TransferSomitesPluripotent Stem CellsCloning, MolecularChimeraSequence Homology, Amino AcidEmbryonic InductionCell MovementXenopus ProteinsNervous SystemFertilizationDrosophilaDrosophila ProteinsMicroinjectionsPregnancy RateMice, Mutant StrainsDNA, ComplementaryCell NucleusTranscription, GeneticSperm Injections, IntracytoplasmicNodal ProteinProteinsEpigenesis, GeneticCulture MediaGenes, LethalSuperovulation