|MadSci Network: Evolution|
Human females may have evolved to diguise their ovulation for many reasons, such as encouraging male investment in offspring, but at the same time they have overt menses. It seems strange for this reason, and also because it would seem to make females a target to predatory animals lured by scents like blood. Do chimpanzees also have such overt menses, and do they serve any purpose in either species?
Re: Why do human females have overt menstruation?
Try the links in the MadSci Library for more information on Evolution.