Germ LayersEmbryo, MammalianEmbryo, NonmammalianChick EmbryoEndodermGastrulaGene Expression Regulation, DevelopmentalMesodermEctodermEmbryonic DevelopmentBlastocystNeoplasms, Germ Cell and EmbryonalEmbryo ImplantationEmbryonic Stem CellsCell DifferentiationTeratomaBody PatterningEmbryonic and Fetal DevelopmentGastrulationOctamer Transcription Factor-3Pluripotent Stem CellsEmbryoid BodiesIn Situ HybridizationZebrafishBlastomeresXenopus ProteinsMorphogenesisEmbryonic InductionNodal Signaling LigandsWheat Germ AgglutininsNodal ProteinCell LineageInduced Pluripotent Stem CellsEmbryo LossZebrafish ProteinsPregnancyZygoteHomeodomain ProteinsSOXB1 Transcription FactorsCleavage Stage, OvumFertilization in VitroBlastodermTestisCell Culture TechniquesMolecular Sequence DataOocytesXenopus laevisTranscription FactorsStem CellsSpermatogenesisOrganizers, EmbryonicRNA, MessengerBlastulaNervous SystemDrosophilaTooth GermImmunohistochemistrySignal TransductionNuclear ReprogrammingSOXF Transcription FactorsSpermatozoaBase SequenceFeeder CellsT-Box Domain ProteinsEmbryo DispositionNotochordParthenogenesisMorulaActivinsChimeraXenopusCryopreservationStage-Specific Embryonic AntigensMutationTesticular NeoplasmsReverse Transcriptase Polymerase Chain ReactionTime FactorsAmino Acid SequenceDrosophila ProteinsPhenotypeModels, BiologicalCell LineKaryotypingGoosecoid ProteinGerm CellsUrochordataSea UrchinsBone Morphogenetic ProteinsDNA-Binding ProteinsGene ExpressionGonadsCulture TechniquesKaryotypeNeural PlateCell MovementCloning, OrganismCells, CulturedNeural CrestAnimals, Genetically ModifiedBone Morphogenetic Protein 4