SpermatogenesisTestisSpermatidsSpermatocytesSeminiferous TubulesSertoli CellsSpermatogoniaSpermatozoaInfertility, MaleSeminiferous EpitheliumSperm CountOligospermiaFertilityAzoospermiaBlood-Testis BarrierGerm CellsMeiosisTestosteroneContraceptive Agents, MaleLeydig CellsEpididymisCryptorchidismSpermatogenesis-Blocking AgentsOrgan SizePachytene StageSperm MotilityFollicle Stimulating HormoneSexual MaturationAntispermatogenic AgentsChromosomes, Human, YTesticular DiseasesProtaminesSperm TailSperm MaturationY ChromosomeSertoli Cell-Only SyndromeSperm HeadVaricoceleMeiotic Prophase IGene Expression Regulation, DevelopmentalAcrosomeMolecular Sequence DataGonadotropinsSeminal VesiclesRNA, MessengerOogenesisGametogenesisLuteinizing HormoneInhibinsSemenMice, KnockoutSeminal Plasma ProteinsGenitalia, MaleImmunohistochemistryBase SequenceHaploidyDisorders of Sex DevelopmentCyclic AMP Response Element ModulatorHypogonadismAmino Acid SequenceReverse Transcriptase Polymerase Chain ReactionIn Situ HybridizationAndrogensRNA-Binding ProteinsMice, Inbred C57BLReceptors, FSHSex ChromosomesAnguillaMice, Mutant StrainsCyclin A1Semen AnalysisGene ExpressionSex Chromosome Disorders of Sex DevelopmentReproductionFertility Agents, MaleSperm RetrievalLepidiumNuclear ProteinsKlinefelter SyndromeGene Expression RegulationOrgan SpecificityMice, TransgenicCell DifferentiationX ChromosomeAcrosinVasectomyTesticular NeoplasmsGonadotropin-Releasing HormoneEelsDrosophila ProteinsRats, Sprague-DawleyPhodopusAndrogen-Binding Protein