AzoospermiaOligospermiaInfertility, MaleChromosomes, Human, YSperm CountAsthenozoospermiaSpermatogenesisSpermatozoaTestisSperm MotilitySex Chromosome AberrationsMesteroloneSeminal Plasma ProteinsSemenSex Chromosome Disorders of Sex DevelopmentSemen AnalysisSperm RetrievalIntestinal ObstructionAirway ObstructionSperm Injections, IntracytoplasmicSequence Tagged SitesKlinefelter SyndromeHydrocarbons, BrominatedY ChromosomeVaricoceleUreteral ObstructionSperm HeadFertilityChromosome DeletionSperm CapacitationTestosteroneTesticular DiseasesSperm MaturationEpididymisAneuploidyVasovasostomyMicrosurgeryKaryotypingVasectomySemen PreservationChromosome AberrationsDuodenal ObstructionEjaculationPregnancyReproductive TechniquesContraceptive Agents, MaleIn Situ Hybridization, FluorescenceCryopreservationUrinary Bladder Neck ObstructionUrethral ObstructionNasal ObstructionFertilizationGastric Outlet ObstructionSpermatidsSuctionVas DeferensVentricular Outflow ObstructionSperm TransportTissue and Organ HarvestingXYY KaryotypeSperm-Ovum InteractionsPregnancy RateMicroinjectionsFollicle Stimulating HormonePolymerase Chain ReactionAcrosomeBiopsyGenetic LociEjaculatory DuctsSperm MidpieceLacrimal Duct ObstructionEmbryo TransferSertoli CellsFertilization in VitroSperm BanksEpitestosteronePregnancy OutcomeTuberculosis, Male GenitalReproductive Techniques, AssistedSeminiferous TubulesInhibinsZona PellucidaCryptorchidismConstriction, PathologicGenital Diseases, MaleCholestasisGonadal Dysgenesis, MixedEpididymitisHydronephrosisCholestasis, Extrahepatic