AcrosomeGuinea PigsSpermatozoaAcrosinSperm CapacitationAcrosome ReactionHyaluronoglucosaminidaseSperm-Ovum InteractionsZona PellucidaSperm CountSperm HeadSus scrofaSwineSperm MaturationGuineaSperm TransportPapua New GuineaSperm Injections, IntracytoplasmicSperm MidpieceInfertility, MaleFertilizationNew GuineaSemenSperm BanksEpididymisSemen PreservationSemen AnalysisTestisEjaculationFertilityIleumSpecies SpecificityCryopreservationSperm WhaleAscorbic Acid DeficiencyOligospermiaSwine DiseasesMuscle, SmoothTracheaEquatorial GuineaSeminal Plasma ProteinsOvum