It seems that according to a recent study, evolution may be to blame for menopause
Menopause Hot Flash
Researchers in Canada studied baboons and blue monkeys in Kenya, chimpanzees in Tanzania, gorillas in Rwanda, sifakas in Madagascar and muriqui monkeys in Brazil, and found that menopause only seems to afflict human females.
While the ability of other primates to reproduce diminishes as they age, they are actually capable of having babies their entire life span.
But somewhere along the evolutionary line, women became able to live beyond their child-rearing years, something apes or monkeys seem unable to do.
One of the reasons for this significant difference may be due to the fact that our eggs have a limited shelf-life and women simply outlive their eggs.
I always feel humbled when I watch monkeys and gorillas at the zoo knowing how closely related we are!