Infertility, MaleOligospermiaAzoospermiaAndrogensReceptors, AndrogenInfertilitySperm CountInfertility, FemaleSpermatogenesisSperm MotilityChromosomes, Human, YTestisSpermatozoaMesteroloneHydrocarbons, BrominatedAsthenozoospermiaTestosteroneVaricoceleAndrogen AntagonistsSemen AnalysisSemenReproductive Techniques, AssistedFertilitySeminal Plasma ProteinsAndrogen Receptor AntagonistsDihydrotestosteroneSertoli Cell-Only SyndromeY ChromosomeFertilization in VitroSperm Injections, IntracytoplasmicAndrologyPregnancySex Chromosome Disorders of Sex DevelopmentEpididymisOrchitisSex Chromosome AberrationsSertoli CellsAbnormal KaryotypeSpermatidsSperm RetrievalVasovasostomyProstatic NeoplasmsProtaminesReproductive TechniquesFallopian Tube DiseasesSperm TailSeminiferous TubulesPregnancy RateTestosterone CongenersMetriboloneChromosome DeletionFlutamideAndrogen-Insensitivity SyndromeKlinefelter SyndromeCryptorchidismEjaculationTesticular DiseasesHypogonadismSperm MaturationReproductive MedicineFollicle Stimulating HormoneSperm-Ovum InteractionsAcrosomeKartagener SyndromeGenital Diseases, MaleFertility Agents, MaleFertilizationInsemination, ArtificialSpermatogoniaGenitalia, MaleEndometriosisSequence Tagged SitesCiliary Motility DisordersHysterosalpingographySpermatocytesAcrosome ReactionCase-Control StudiesEjaculatory DuctsProstateAxonemal DyneinsSperm HeadPregnancy OutcomeVas DeferensMutationEpididymitisLuteinizing HormoneMeiosisAnovulationEmbryo TransferClomipheneGene DeletionAndrostenedioneZona PellucidaMicrosurgeryTesticular NeoplasmsUrologic Surgical Procedures, MaleGerm CellsInseminationBase SequenceSperm Capacitation