Germ CellsCell DifferentiationSpermatogenesisTestisSpermatogoniaGonadsGametogenesisOogoniaSertoli CellsGene Expression Regulation, DevelopmentalSpermatozoaNeoplasms, Germ Cell and EmbryonalMeiosisOvarySpermatidsSeminiferous TubulesSeminiferous EpitheliumEmbryonic Stem CellsOctamer Transcription Factor-3DEAD-box RNA HelicasesSpermatocytesStem CellsRNA-Binding ProteinsIn Situ HybridizationEmbryo, NonmammalianGerm LayersRNA, MessengerEmbryo, MammalianCryptorchidismSex DifferentiationOogenesisCell LineageCell MovementMolecular Sequence DataTesticular NeoplasmsBase SequenceCells, CulturedChimeraZebrafishOryziasPluripotent Stem CellsOvarian FollicleBlastodermTranscription FactorsSignal TransductionChick EmbryoEmbryonic DevelopmentOocytesOvumInfertility, MaleImmunohistochemistryGenitaliaMice, TransgenicReverse Transcriptase Polymerase Chain ReactionStem Cell FactorEmbryonic and Fetal DevelopmentGenomic ImprintingSeminomaMice, Inbred C57BLProto-Oncogene Proteins c-kitCell DivisionEndodermAllantoisAnimals, Genetically ModifiedZebrafish ProteinsCell ProliferationMesodermGreen Fluorescent ProteinsCell Culture TechniquesDNA MethylationHomeodomain ProteinsGastrulaDNA-Binding ProteinsCell LineMice, KnockoutGene Expression RegulationEpigenesis, GeneticCypriniformesCell CountGerminomaDrosophila ProteinsBone Morphogenetic Protein 4PhenotypeTretinoinAlkaline PhosphataseTeratomaMutationGene ExpressionUrogenital SystemGene Expression ProfilingCell SeparationLeukemia Inhibitory FactorAmino Acid SequenceSex Determination ProcessesFetusEmbryologyDNA PrimersRepressor ProteinsAntigens, CD15Time Factors