SpermatogenesisAndrogensReceptors, AndrogenTestisAndrogen AntagonistsSpermatidsSpermatocytesSeminiferous TubulesSertoli CellsSpermatogoniaSpermatozoaTestosteroneInfertility, MaleSeminiferous EpitheliumDihydrotestosteroneSperm CountAndrogen Receptor AntagonistsFertilityOligospermiaAzoospermiaBlood-Testis BarrierProstatic NeoplasmsFlutamideGerm CellsMeiosisContraceptive Agents, MaleLeydig CellsTestosterone CongenersEpididymisNerve BlockMetriboloneCryptorchidismOrgan SizeAndrogen-Insensitivity SyndromeHeart BlockSpermatogenesis-Blocking AgentsFollicle Stimulating HormoneProstateSexual MaturationSperm MotilityPachytene StageRNA, MessengerSeminal VesiclesMolecular Sequence DataGenitalia, MaleLuteinizing HormoneNandroloneTesticular DiseasesImmunohistochemistryAntispermatogenic AgentsBase SequenceSperm MaturationChromosomes, Human, YSertoli Cell-Only SyndromeGene Expression Regulation, DevelopmentalReverse Transcriptase Polymerase Chain ReactionHypogonadismGonadotropinsAndrostenedioneProtaminesSperm TailY ChromosomeAndrogen-Binding ProteinFeminizationNeoplasms, Hormone-DependentAmino Acid SequenceSperm HeadDisorders of Sex DevelopmentVaricoceleMeiotic Prophase IGonadal Steroid HormonesAndrostane-3,17-diolMice, KnockoutEstradiolAromataseAcrosomeGonadotropin-Releasing HormoneDehydroepiandrosteroneGene Expression RegulationOogenesisInhibinsGene ExpressionMice, Inbred C57BL3-Oxo-5-alpha-Steroid 4-DehydrogenaseSteroid 17-alpha-HydroxylaseMutationRats, Sprague-DawleyApoptosisSeminal Plasma ProteinsGametogenesisTranscription, GeneticReceptors, FSHIn Situ HybridizationCell NucleusSemenSex DifferentiationSignal TransductionMice, Transgenic3-Hydroxysteroid DehydrogenasesReproduction