Embryo, MammalianGerm LayersBlastocystEmbryonic DevelopmentEmbryo, NonmammalianGene Expression Regulation, DevelopmentalEmbryonic and Fetal DevelopmentChick EmbryoEndodermEctodermZygoteEmbryo ImplantationEmbryo Culture TechniquesGastrulaMammalsBody PatterningBlastocyst Inner Cell MassMesodermBlastodermFibroblast Growth Factor 4Octamer Transcription Factor-3MorulaBlastomeresEmbryonic Stem CellsPregnancyCulture TechniquesCleavage Stage, OvumMorphogenesisCell DifferentiationCell LineageIn Situ HybridizationPluripotent Stem CellsHomeodomain ProteinsMolecular Sequence DataTranscription FactorsTotipotent Stem CellsPrimitive StreakYolk SacFertilization in VitroSignal TransductionMice, Inbred CBAGastrulationTrophoblastsEmbryonic InductionAmino Acid SequenceStem CellsOocytesBase SequenceMice, Inbred ICRNodal ProteinTissue SurvivalGenomic ImprintingRNA, MessengerMice, Inbred C57BLEmbryo LossDNA-Binding ProteinsNeural CrestModels, BiologicalGerm CellsMice, TransgenicOtx Transcription FactorsCattleGene ExpressionTime FactorsChimeraPhenotypeCells, CulturedGestational AgeCell MovementImmunohistochemistryNeural PlateEpigenesis, GeneticMice, KnockoutZebrafishQuailGATA6 Transcription FactorCell LineEctogenesisMutationSequence Homology, Amino AcidEmbryo DispositionBone Morphogenetic Protein 4Nervous SystemZebrafish ProteinsBone Morphogenetic ProteinsLeft-Right Determination FactorsCryopreservationCloning, MolecularActivinsSOXB1 Transcription FactorsDNA, ComplementaryTissue TransplantationGrowth Differentiation Factor 3Fibroblast Growth FactorsSomitesTrans-ActivatorsCloning, OrganismDrosophila ProteinsEmbryo ResearchDNA Primers