> *All* post-menopausal women? Given that menopause generally occurs
> earlier in most societies than it does in modern westernized
> countries
A slight correction:
The average age of menopause is 50-51 years and this has not changed
in modern countries for centuries. For *menstruation*, the age of
onset has decreased remarkably in last 150 year or so, so that girls
in the western world nowadays start menstruating 4-6 years earlier.
Juha Ratilainen
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