Germ CellsClone CellsNeoplasms, Germ Cell and EmbryonalTestisSpermatogenesisTesticular NeoplasmsSpermatozoaEmbryo, NonmammalianMolecular Sequence DataGerminomaSertoli CellsSpermatogoniaSeminiferous TubulesGene Expression Regulation, DevelopmentalEmbryo, MammalianBase SequenceSpermatocytesCell DifferentiationSpermatidsAmino Acid SequenceGonadsSeminomaTeratomaMeiosisCloning, MolecularRNA, MessengerEmbryonic DevelopmentCell LineOogenesisOvumCarcinoma, EmbryonalCells, CulturedCaenorhabditis elegansOocytesBlastocystWheat Germ AgglutininsSeminiferous EpitheliumDysgerminomaCell LineageCell DivisionOvaryOctamer Transcription Factor-3Embryonic Stem CellsGerm LayersGametogenesisGastrulaDNAMutationStem CellsEndodermal Sinus TumorIn Situ HybridizationBlastomeresOogoniaCaenorhabditis elegans ProteinsDNA, ComplementaryImmunohistochemistryCell AggregationChimeraMitosisT-LymphocytesTranscription FactorsPhenotypeXenopus ProteinsGene ExpressionSex DifferentiationMice, Inbred C57BLReverse Transcriptase Polymerase Chain ReactionDrosophila ProteinsTranscription, GeneticChick EmbryoNuclear Receptor Subfamily 6, Group A, Member 1ApoptosisTeratocarcinomaPluripotent Stem CellsVitellinsRNA-Binding ProteinsPolymerase Chain ReactionLymphocyte ActivationCell MovementSequence Homology, Amino AcidDNA-Binding ProteinsMice, TransgenicDNA PrimersTransfectionTooth GermGene Expression RegulationZebrafishSignal TransductionInfertility, MaleDrosophilaCryptorchidismXenopus laevisEmbryonic and Fetal DevelopmentXenopusTime FactorsMice, Inbred StrainsCell CycleEndodermNuclear ProteinsTotipotent Stem Cells