Infertility, MaleOligospermiaSpermatogenesisAzoospermiaTestisSperm CountInfertilitySpermatozoaInfertility, FemaleSperm MotilityChromosomes, Human, YMesteroloneSpermatidsSeminiferous TubulesSertoli CellsSpermatocytesAsthenozoospermiaVaricoceleHydrocarbons, BrominatedSpermatogoniaSemen AnalysisFertilityTestosteroneSemenSeminal Plasma ProteinsReproductive Techniques, AssistedEpididymisSertoli Cell-Only SyndromeY ChromosomeSeminiferous EpitheliumSex Chromosome Disorders of Sex DevelopmentMeiosisProtaminesGerm CellsSex Chromosome AberrationsSperm Injections, IntracytoplasmicSperm TailCryptorchidismSperm RetrievalOrchitisFertilization in VitroPregnancyAndrologyTesticular DiseasesSperm MaturationAbnormal KaryotypeFollicle Stimulating HormoneAcrosomeReproductive TechniquesLeydig CellsBlood-Testis BarrierVasovasostomyContraceptive Agents, MaleSperm HeadKlinefelter SyndromeFertility Agents, MaleChromosome DeletionFallopian Tube DiseasesPregnancy RateHypogonadismFertilizationEjaculationOrgan SizeSperm-Ovum InteractionsAcrosome ReactionGenitalia, MaleMice, KnockoutInsemination, ArtificialReproductive MedicineGenital Diseases, MaleSequence Tagged SitesTesticular NeoplasmsRNA-Binding ProteinsKartagener SyndromeMutationLuteinizing HormonePachytene StageSpermatogenesis-Blocking AgentsMolecular Sequence DataInseminationBase SequenceVas DeferensGene DeletionEndometriosisCiliary Motility DisordersHysterosalpingographyReproductionScrotumRNA, MessengerGonadotropinsGene Expression Regulation, DevelopmentalCase-Control StudiesMicrosurgeryAxonemal DyneinsPregnancy OutcomeSexual MaturationEpididymitisHomozygoteEjaculatory DuctsAntispermatogenic Agents