SpermatozoaSperm MotilityInfertility, MaleSperm CountSemenSperm HeadSemen AnalysisFertilityAsthenozoospermiaSpermatogenesisSperm-Ovum InteractionsAcrosomeTestisSperm TailAcrosome ReactionManuals as TopicAndrologyOligospermiaFertilizationEjaculationEpididymisFertilization in VitroStrongylocentrotusPregnancy RateSperm Injections, IntracytoplasmicScrotumSperm MaturationEmbryologySemen PreservationInsemination, Artificial, HomologousSperm CapacitationMedical Laboratory PersonnelPregnancyPasseriformesSeminal Plasma ProteinsTestosteroneInfertilityWorld Health OrganizationZona PellucidaReproductionColoring AgentsCryopreservationSperm TransportMicroscopy, Phase-ContrastSperm MidpieceQuality ControlBiological EvolutionStaining and LabelingSperm BanksReference ValuesIn Situ Hybridization, FluorescenceImage Processing, Computer-AssistedSperm WhaleOvumMicroscopy, Electron, ScanningMicroscopy, ElectronProtamines