Karen,
I think you heard it right here on Lactnet!  :-)  On 7 March 2004
Sara Bernard posted an abstract about this, under the subject "return
of menses - journal ref."
<http://peach.ease.lsoft.com/scripts/wa.exe?A2=ind0403A&L=lactnet&P=R13482&I=-3&X=4270E76357A1122BE6>

Hope this is what you wanted!

Margaret
Longmont, CO

>Dear Lactnetters,
>It seems a couple of weeks ago I heard this on the news- or I was
>dreaming??? I have searched pubmed with no luck.
>Does anyone remember hearing about a Prenancy Hormone?? at 38 weeks
>gestation that can help to predict the amenorrhea post-partum. I am looking
>for this article.
>Thanks so much,
>Karen Querna
>Spokane WA USA
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