SpermatogenesisGerm CellsTestisNeoplasms, Germ Cell and EmbryonalSpermatidsSeminiferous TubulesSpermatocytesSertoli CellsSpermatogoniaSpermatozoaInfertility, MaleSeminiferous EpitheliumTesticular NeoplasmsSperm CountMeiosisGerminomaFertilityBlood-Testis BarrierGonadsOligospermiaAzoospermiaSeminomaTestosteroneCryptorchidismGene Expression Regulation, DevelopmentalOogenesisContraceptive Agents, MaleGametogenesisEpididymisPachytene StageLeydig CellsOrgan SizeOvaryMolecular Sequence DataSperm MotilityRNA, MessengerCell DifferentiationWheat Germ AgglutininsImmunohistochemistryTesticular DiseasesFollicle Stimulating HormoneSpermatogenesis-Blocking AgentsDysgerminomaRNA-Binding ProteinsSexual MaturationAntispermatogenic AgentsSex DifferentiationNuclear Receptor Subfamily 6, Group A, Member 1Germ LayersIn Situ HybridizationMeiotic Prophase IY ChromosomeBase SequenceTeratomaEndodermal Sinus TumorChromosomes, Human, YSertoli Cell-Only SyndromeOogoniaProtaminesSperm TailSperm MaturationReverse Transcriptase Polymerase Chain ReactionDisorders of Sex DevelopmentAmino Acid SequenceAcrosomeMice, KnockoutDrosophila ProteinsSperm HeadHaploidyMice, Inbred C57BLStem CellsSex Determination ProcessesCaenorhabditis elegansApoptosisVaricoceleGonadotropinsDEAD-box RNA HelicasesMice, TransgenicOocytesMutationGene ExpressionInhibinsTooth GermDrosophilaSeminal VesiclesX ChromosomeCaenorhabditis elegans ProteinsIn Situ Nick-End LabelingDrosophila melanogasterCyclic AMP Response Element ModulatorNuclear ProteinsGenitalia, MaleSex ChromosomesSex Determination AnalysisKlinefelter SyndromeOvumGene Expression RegulationProto-Oncogene Proteins c-kitSemenLuteinizing Hormone