I never found it to be really all that true....I mean, there are only four weeks in a month and an average period lasts 5 days...there is just a pretty good chance for some overlap. That is my impression. I grew up with two sisters...never saw it. I work with 4 women all day in one room...don't see it. If one woman gets her period 4 days after another woman, that isn't exactly synched. Why is is advantageous in terms of competition for pregnancy for everyone to be on the same cycle anyway? I would think it would be better for one female at a time to get all the male attention in that regard. Also, if you go back to more primitive human times, it would certainly not be advantageous for all the women to be in the hut at the same time either. Who would be out doing all the women's work then?
at 9:26 PM on Jul. 27, 2010