Magungunan antisperm (ASA) - kwayoyin da ke jikin mutum ya ke haifar da kwayar cutar maniyyi.Krause 2017: 109) Samuwar ASA na ɗaya daga cikin dalilan raguwar haihuwa ko rashin haihuwa na asali: ASA yana shafar aikin maniyyi, canza yanayin tasirin acrosomal (AR), da kuma tarwatsa hadi, kafawa da haɓakar tayin (2013) haifar da rarrabuwa na DNA (Kirilenko 2017) Nazarin kan nau'ikan dabbobi daban-daban sun nuna alaƙa tsakanin ASA da taɓar ciki tayi kafin ko bayan fashewar (Krause 2017: 164) Ana bincika maganin hana haifuwa na ASA yayin haɓakar rigakafin rigakafin ƙwayar cuta ga mutane (Krause 2017: 251), tare da ragewa da sarrafa yawan namun daji (Krause 2017: 268).