I am convinced this has something to do with prostaglandins. I do not have Lawrence's most recent edition at home, but in 3rd ed. pp. 63 and 200 tell of possible role in m.e.r. Also diarrhea common in onset of menstrual period for many. This I read somewhere has to do with prostaglandins. Also when I got Prostin after my first birth for uterine atony, the diarrhea was immediate and unbelievable. Laurie Wheeler, RN, MN, IBCLC Violet Louisiana, SE USA mailto:[log in to unmask] ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com