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Sperm CountSpermatozoaSperm HeadSperm MotilitySemen AnalysisInfertility, MaleSemenManuals as TopicAndrologyFertilityStrongylocentrotusSperm-Ovum InteractionsAcrosomeAsthenozoospermiaSperm MaturationEmbryologySemen PreservationInsemination, Artificial, HomologousSperm CapacitationSperm TailMedical Laboratory PersonnelTestisAcrosome ReactionFertilizationEpididymisEjaculationOligospermiaPasseriformesSperm Injections, IntracytoplasmicSpermatogenesisFertilization in VitroInfertilityPregnancy RateWorld Health OrganizationZona PellucidaPregnancyReproductionColoring AgentsCryopreservationSperm TransportMicroscopy, Phase-ContrastTestosteroneSperm MidpieceQuality ControlBiological EvolutionStaining and LabelingSperm BanksReference ValuesIn Situ Hybridization, FluorescenceImage Processing, Computer-AssistedSperm WhaleOvumMicroscopy, Electron, ScanningMicroscopy, ElectronProtaminesSeminal Plasma ProteinsInsemination, ArtificialOocytesSea UrchinsEgg ProteinsSexual Behavior, AnimalAzoospermiaFallopian TubesMolecular Sequence DataGenitalia, MaleSeminal Vesicle Secretory ProteinsCryoprotective AgentsPhenotypeTime FactorsWhalesInseminationVasectomyCell SizeSpecies SpecificityDNA FragmentationMicroinjectionsMicroscopy, Electron, TransmissionCattleCell MembraneMicroscopy, FluorescenceCopulationZygoteAneuploidyVitelline MembraneCells, CulturedSwineMutationImmunohistochemistryAmino Acid SequenceReproductive Techniques, AssistedChromomycin A3Reproductive TechniquesOrgan SizePovidoneContraceptive Agents, MaleChromatinModels, BiologicalCell NucleusOviductsPhylogeny