SpermatogenesisSpermatozoaTestisSperm MotilitySpermatidsInfertility, MaleSpermatocytesSeminiferous TubulesAcrosomeEpididymisSperm CountSertoli CellsSpermatogoniaSemen PreservationSperm HeadSperm MaturationOligospermiaSperm TailSperm TransportSemenSeminiferous EpitheliumAcrosome ReactionFertilityEjaculationCryopreservationFertilizationAzoospermiaContraceptive Agents, MaleGerm CellsMeiosisBlood-Testis BarrierSemen AnalysisTestosteroneAcrosinZona PellucidaInsemination, ArtificialFertilization in VitroSperm AgglutinationProtaminesLeydig CellsY ChromosomeSeminal Plasma ProteinsSperm Injections, IntracytoplasmicAsthenozoospermiaCryoprotective AgentsCryptorchidismOrgan SizePachytene StageChlorohydrinsSpermatogenesis-Blocking AgentsSperm Retrievalalpha-ChlorohydrinFallopian TubesSexual MaturationVasectomyFollicle Stimulating HormoneTesticular DiseasesSeminal VesiclesChromosomes, Human, YGenitalia, MaleInseminationVaricoceleAntispermatogenic AgentsRete TestisKlinefelter SyndromeChlortetracyclineOocytesSex PreselectionMolecular Sequence DataPregnancyMicroscopy, ElectronSperm MidpieceChromomycin A3SwineCattleMicroinjectionsImmunohistochemistryHaploidyRNA, MessengerOogenesisSex ChromosomesGene Expression Regulation, DevelopmentalMesocricetusSertoli Cell-Only SyndromePovidoneMeiotic Prophase IX ChromosomeLuteinizing HormoneAmino Acid SequenceGonadotropinsMice, Inbred C57BLFertility Agents, MaleGametogenesisReproductionProteinsMice, KnockoutCricetinaeVas DeferensBase SequenceReverse Transcriptase Polymerase Chain Reaction