Apropos of my previous entry: I just found a paper on the internet, albeit not a very recent one, that seems to hypothesize that the reason that ovulation is concealed from the female herself is indeed what I conjectured in my previous post (prehistoric women that avoided sex during fertile periods tended to be supplanted in the gene pool by those for whom ovulation was concealed). The article is titled "The Evolution of Concealed Ovulation", by Nancy Burley, and appears in the journal The American Naturalist, December 1979. Note that this paper was published almost 30 years ago, and it would seem that there has been adequate time to examine this hypothesis, and perhaps it has been largely rejected by evolutionary biologists. However, it is interesting that the Burley paper refers to, but apparently rejects, the Noonan-Alexander hypothesis (also 1979) cited by Linden in his book (see the previous post for the reference), so both hypotheses have been around about the same length of time.
So.......I continue to wonder, what is the current best theory among biologists to explain this feature of human biology. Anyone?