Sperm TailSperm HeadTailSpermatozoaSperm CapacitationSperm MotilitySpermatidsSperm CountTestisSperm MaturationAcrosomeSeminal Plasma ProteinsInfertility, MaleEpididymisSpermatogenesisSperm MidpieceSperm-Ovum Interactionst-Complex Genome RegionFertilizationFertilityMicroscopy, ElectronSperm TransportSea UrchinsSperm Injections, IntracytoplasmicDyneinsMolecular Sequence DataAcrosome ReactionAmino Acid SequenceFlagellaSemenSperm BanksMicrotubulesSemen PreservationFluorescent Antibody TechniqueProteinsSemen AnalysisCiliaHeat-Shock ProteinsZona PellucidaBase SequenceEjaculation