Quote Originally Posted by khg View Post
I once read an interesting article that argued that having regular periods from adolescence through menopause is actually a very modern thing. For most of human history, women spent much of their menstruating years either pregnant or nursing, and didn't have frequent periods. In other words, that getting your period every month for most of your fertile life is, historically speaking, unnatural.

I don't know what that really means one way or another, but I found it interesting to think about...
.

I've read that too, and while I get the idea, in many ways it is ridiculous if you really think about it. For it to have truth, ALL women would have to have back to back pregnancies, miscarriages and periods of nursing. While certainly SOME women had lives like this, many did not. Whether they were infertile, practicing what birth control they could, had infertile partners, abstinent, I'm sure there were lots of women out there menstruating regularly. Other mammals have regular estrus cycles. Why not humans?