Semen AnalysisSemenSperm CountSperm MotilityInfertility, MaleAndrologySpermatozoaSemen PreservationVaricoceleManuals as TopicOligospermiaEjaculationVasectomyAsthenozoospermiaSperm BanksAzoospermiaFertilityClinical Laboratory ServicesChromomycin A3Acrosome ReactionCryopreservationScrotumEmbryologySpermatogenesisInsemination, ArtificialTestisSperm HeadSpermatoceleSperm-Ovum InteractionsSexual AbstinenceInfertilityWorld Health OrganizationQuality ControlSeminal Plasma ProteinsFertility PreservationReproductive Techniques, AssistedInsemination, Artificial, HomologousPregnancy RateChromosomes, Human, YFertilization in VitroPregnancyClinical Laboratory TechniquesTestosteroneFertilizationFollicle Stimulating HormoneZona PellucidaSperm Injections, IntracytoplasmicInfertility, FemaleReference ValuesDNA FragmentationLuteinizing HormoneTime FactorsRetrospective StudiesProspective Studies