Germ LayersEndodermGastrulaNeoplasms, Germ Cell and EmbryonalEmbryonic Stem CellsMesodermEctodermTeratomaCell DifferentiationGene Expression Regulation, DevelopmentalEmbryoid BodiesPluripotent Stem CellsOctamer Transcription Factor-3GastrulationWheat Germ AgglutininsInduced Pluripotent Stem CellsEmbryo, NonmammalianNodal Signaling LigandsBody PatterningSOXB1 Transcription FactorsEmbryo, MammalianNodal ProteinCell LineageXenopus ProteinsEmbryonic InductionTestisCell Culture TechniquesIn Situ HybridizationSpermatogenesisBlastulaTooth GermMorphogenesisZebrafishFeeder CellsStem CellsNuclear ReprogrammingSOXF Transcription FactorsEmbryonic DevelopmentOrganizers, EmbryonicTesticular NeoplasmsHomeodomain ProteinsStage-Specific Embryonic AntigensZebrafish ProteinsBlastodermActivinsXenopus laevisImmunohistochemistrySpermatozoaT-Box Domain ProteinsKaryotypingCells, CulturedKaryotypeSignal TransductionMolecular Sequence DataEmbryonic and Fetal DevelopmentTranscription FactorsNervous SystemGerminomaCell DedifferentiationSpermatogoniaSertoli CellsBlastocystRNA, MessengerSeminiferous TubulesBlastomeresCell LineReverse Transcriptase Polymerase Chain ReactionNeural PlateDrosophilaKruppel-Like Transcription FactorsReceptor, EphB1GonadsModels, BiologicalSpermatocytesGoosecoid ProteinBase SequencePrimitive StreakSpermatidsChimeraNotochordGerm CellsXenopusChick EmbryoCell MovementBone Morphogenetic Protein 4Biological MarkersHepatocyte Nuclear Factor 3-betaMutationFibroblastsBone Morphogenetic ProteinsZygoteFibroblast Growth FactorsUrochordataGATA Transcription FactorsSeminomaAmino Acid SequenceFibroblast Growth Factor 4Gene ExpressionTime FactorsNeurons