Germ LayersEndodermGastrulaNeoplasms, Germ Cell and EmbryonalMesodermEmbryonic Stem CellsEctodermCell DifferentiationTeratomaGene Expression Regulation, DevelopmentalPluripotent Stem CellsEmbryoid BodiesOctamer Transcription Factor-3GastrulationEmbryo, NonmammalianWheat Germ AgglutininsInduced Pluripotent Stem CellsNodal Signaling LigandsBody PatterningMolecular Sequence DataEmbryo, MammalianSOXB1 Transcription FactorsCell LineageNodal ProteinXenopus ProteinsEmbryonic InductionWorld Health OrganizationIn Situ HybridizationTestisCell Culture TechniquesMorphogenesisSpermatogenesisBase SequenceBlastulaZebrafishTooth GermAmino Acid SequenceStem CellsEmbryonic DevelopmentFeeder CellsOrganizationsNuclear ReprogrammingSOXF Transcription FactorsHomeodomain ProteinsOrganizers, EmbryonicZebrafish ProteinsImmunohistochemistryCells, CulturedTesticular NeoplasmsModels, BiologicalSignal TransductionBlastodermStage-Specific Embryonic AntigensXenopus laevisCell LineTranscription FactorsRNA, MessengerSpermatozoaActivinsKaryotypingMutationDrosophilaT-Box Domain ProteinsNervous SystemEmbryonic and Fetal DevelopmentKaryotypeReverse Transcriptase Polymerase Chain ReactionCloning, MolecularTime FactorsGerminomaBlastocystSertoli CellsBlastomeresSpermatogoniaNeuronsSeminiferous TubulesCell MovementMicroscopy, ElectronCell DedifferentiationNeural PlateHealth Maintenance OrganizationsPhenotypeKruppel-Like Transcription FactorsChick EmbryoFibroblastsGene ExpressionGonadsXenopusAccountable Care OrganizationsSpermatocytesReceptor, EphB1SpermatidsDNA-Binding ProteinsTranscription, GeneticDrosophila ProteinsChimeraGreen Fluorescent ProteinsGerm CellsCell AdhesionOrganizations, Nonprofit