This was not John Rock's error. Nor was it his church's. It was the fault of the haphazard nature of science, which all too often produces progress in advance of understanding.It does look like it might be time to strike "and still is" from my statement, but you know lots of things have gone unaccepted for decades even though the clues were all but shouting -- plate tectonics and the K-T impactor come immediately to mind. And those things don't have the explosive social implications that were whirling around the invention of the Pill.
Among the Dogon, she found, a woman, on average, has her first period at the age of sixteen and gives birth eight or nine times. From menarche, the onset of menstruation, to the age of twenty, she averages seven periods a year.It is by no means definitive, but it does seem to support what Asparagirl and others have said about the current state of things not being as normal as we assume.
Over the next decade and a half, from the age of twenty to the age of thirty-four, she spends so much time either pregnant or breast-feeding (which, among the Dogon, suppresses ovulation for an average of twenty months) that she averages only slightly more than one period per year.
Then, from the age of thirty-five until menopause, at around fifty, as her fertility rapidly declines, she averages four menses a year.
All told, Dogon women menstruate about a hundred times in their lives. (Those who survive early childhood typically live into their seventh or eighth decade.) By contrast, the average for contemporary Western women is somewhere between three hundred and fifty and four hundred times.
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That's not really a design question, is it?
posted by sanko at 6:54 AM on August 14, 2010 [4 favorites]