Sperm TailInfertility, MaleSperm HeadSpermatozoaAsthenozoospermiaSperm CountSperm MotilityAcrosomeOligospermiaSemenTailSperm CapacitationSpermatidsFertilization in VitroInjectionsEmbryo TransferTestisSperm MaturationSeminal Plasma ProteinsEpididymisSpermatogenesisSperm MidpieceSperm-Ovum InteractionsPregnancyt-Complex Genome RegionFertilizationFertilityMicroscopy, ElectronSperm Injections, IntracytoplasmicSperm TransportSea UrchinsMolecular Sequence DataDyneinsAcrosome ReactionAmino Acid SequenceInjections, IntravenousInjections, IntramuscularFlagellaSperm BanksMicrotubulesSemen PreservationFluorescent Antibody TechniqueProteinsInjections, SubcutaneousInjections, IntralesionalInjections, Intra-ArticularSemen AnalysisCiliaHeat-Shock ProteinsZona PellucidaBase SequenceEjaculationImmunohistochemistryDNA, ComplementaryInjections, Intraperitoneal