Kwayoyin rigakafi na hana maniyyi (ASAs) ƙwayoyin rigakafi ne da jikin ɗan adam ke samarwa akan ƙwayoyin rigakafi na maniyyi ( Krause 2017: 109 ). Samuwar ASA yana ɗaya daga cikin abubuwan da ke haifar da raguwar haihuwa ko rashin haihuwa ta hanyar autoimmune: ASAs suna shafar aikin maniyyi, suna canza yanayin amsawar acrosome (AR), suna kawo cikas ga tsarin hadi, dasawa da ci gaban tayi ( Restrepo 2013 ), kuma suna haifar da rarrabuwar DNA ( Kirilenko 2017 ). Nazarin da aka yi a cikin samfuran dabbobi daban-daban sun nuna alaƙa tsakanin ASAs da lalacewar tayi kafin ko bayan dasawa ( Krause 2017: 164 ). Ana nazarin tasirin hana haihuwa na ASAs yayin haɓaka allurar rigakafin rigakafi ga mutane ( Krause 2017: 251 ), da kuma rage yawan dabbobin daji da kuma kula da su ( Krause 2017: 268 ).

Tun daga tsakiyar karni na 20, a ƙarƙashin tutar "matsalar yawan jama'a," duniya ta fuskanci kamfen na farfaganda na duniya da nufin rage yawan haihuwa da yawan jama'a sosai. A mafi yawan ƙasashe masu tasowa, adadin haihuwa ya riga ya faɗi ƙasa da matakin maye gurbin, kuma adadin tsofaffi ya yi daidai ko ma ya wuce adadin yara. Aure yana ƙara ƙarewa da saki kuma ana maye gurbinsa da zama tare. Al'amuran aure bayan aure, luwaɗi, da batutuwan canza jinsi sun zama fifiko. Rage yawan jama'a, ba tatsuniyoyi ba, ya zama sabon gaskiyar duniya.