These possibilities are increasingly used in the context of fertility and related behaviors. A close congruence between the fertility patterns of twins and that of the general population, however, is ...

Yet despite this latest observed decline in birth rates, the number of twins and triplets being born ... as older-age pregnancy and greater use of fertility treatments appear to be key factors.

While genetics and other natural factors play a significant role in twin conception, some believe that certain herbs can improve fertility and increase the chances of conceiving twins. Although ...