Infertility has been relatively neglected as both a health problem and a subject for social science research in South Asia, as in the developing world more generally. The general thrust of both programmes and research has been on the correlates of high fertility and its regulation rather than on

In recent decades, the most common means by which couples regulate fertility have changed from methods requiring control or cooperation by men, e.g., condoms, withdrawal and periodic abstinence, to those for which women bear primary responsibility e.g., virtually all-reversible modern methods.

After Ritter and Hinkelmann, Kirk and his Colleagues Kirk also reported that in matings where the father is in-compatible with the mother with respect to the ABO groups, the children show a higher frequency of the Hp1 gene.