Germ CellsNeoplasms, Germ Cell and EmbryonalTestisSpermatogenesisTesticular NeoplasmsGonadsSpermatozoaGerminomaSertoli CellsSpermatogoniaSeminiferous TubulesSpermatocytesSpermatidsSeminomaGene Expression Regulation, DevelopmentalMeiosisGerm LayersGametogenesisOogenesisOvaryWheat Germ AgglutininsSeminiferous EpitheliumDysgerminomaSex DifferentiationCell DifferentiationTeratomaEndodermal Sinus TumorOogoniaOctamer Transcription Factor-3Embryo, NonmammalianOvumEmbryo, MammalianRNA-Binding ProteinsOryziasNuclear Receptor Subfamily 6, Group A, Member 1Tooth GermIn Situ HybridizationOocytesImmunohistochemistryInfertility, MaleCryptorchidismCell MovementPluripotent Stem CellsEmbryonic DevelopmentMolecular Sequence DataMediastinal NeoplasmsRNA, MessengerChimeraSex Determination ProcessesDEAD-box RNA HelicasesZebrafishCell LineageStem CellsCarcinoma, EmbryonalDrosophila ProteinsGenomic ImprintingRetroperitoneal NeoplasmsBlastodermEmbryonic Stem CellsGenitaliaBase SequenceProto-Oncogene Proteins c-kitSperm CountCaenorhabditis elegansReverse Transcriptase Polymerase Chain ReactionApoptosisBlood-Testis BarrierDrosophilaMice, TransgenicDNA MethylationAnimals, Genetically ModifiedPachytene StageMutationGreen Fluorescent ProteinsCaenorhabditis elegans ProteinsMice, Inbred C57BLAmino Acid SequenceChoriocarcinomaEmbryonic and Fetal DevelopmentTranscription Factorsalpha-FetoproteinsBleomycinStem Cell FactorAnimals, Inbred StrainsFetusAllantoisFertilityCell CountCells, CulturedZebrafish ProteinsDrosophila melanogasterIn Situ Nick-End LabelingDisorders of Sex DevelopmentSignal TransductionAntigens, CD15Mice, Inbred ICRTestosteroneChick EmbryoOrchitisMice, Knockout