Hi --
It seems like my questions are getting weirder and weirder ... or, is that: "curiouser and curiouser"?
In any case -- I need to know when, approximately, it became common knowledge that menstruation and pregnancy were intrinsically linked. In particular, when would the "rhythm" method (i.e. calculating fertile days from the date of a woman's last period) be in widespread use in China? The United States?
Would it be common knowledge by 1900 or so?
Thanks --
It seems like my questions are getting weirder and weirder ... or, is that: "curiouser and curiouser"?
In any case -- I need to know when, approximately, it became common knowledge that menstruation and pregnancy were intrinsically linked. In particular, when would the "rhythm" method (i.e. calculating fertile days from the date of a woman's last period) be in widespread use in China? The United States?
Would it be common knowledge by 1900 or so?
Thanks --