Insemination, Artificial, HeterologousSperm BanksTissue DonorsSpermatozoaCryopreservationSperm CountSperm HeadPregnancySperm CapacitationBlood DonorsLiving DonorsSperm MaturationSperm TransportSperm-Ovum InteractionsSperm Injections, IntracytoplasmicAcrosomeInfertility, MaleSperm MidpieceFertilizationSemenEpididymisSemen PreservationSemen AnalysisZona PellucidaTestisEjaculationFertilitySperm WhaleOligospermiaOvumAsthenozoospermiaSeminal Plasma ProteinsTissue and Organ ProcurementProtaminesInsemination, Artificial