Masu bincike na Amurka sun yanke shawarar cewa 'ya'yan da aka haifa ba tare da daɗe ba, yawancin lokaci daga baya, ba su da ɗa

Wannan ƙaddamarwa ta samo asali ne daga masana kimiyyar Amurka wadanda suka gano sakamakon mutane miliyan 1.2 da aka haifa a Norway daga 1967 zuwa 1988. A cewar masu bincike daga Cibiyar Magunguna a Jami'ar Duke, kimanin yara kimanin 60,000 da aka haifa a wannan lokacin sun haifa ba tare da daɗe ba. Bayan haka, yara, waɗanda aka haife su don makonni 28 zuwa 32. sun kasance iyayensu 30% kasa da yawa fiye da waɗanda aka haifa a lokacin. A lokacin haihuwar karami, haɗarin rashin haihuwa ya karu, Geeta Swami, jagorar mai binciken, ya kawo hankalin. Yarin da aka haife su a makonni 22 da bakwai. ciki, samun 'ya'yansu da kashi 76% sau da yawa fiye da waɗanda aka haifa a cikin makon 37. Kuma' yan matan da aka haife su a wannan rana sun zama marasa 'ya'ya da 67% fiye da waɗanda aka haifa a lokaci.