Hm red raspberry leaf tea is highly recommended for pregnant women as it helps strengthen the uterine and pelvic muscle tone to aid in delivery so I can't imagine why your homeopath would think it would induce a miscarriage. It is often used throughout pregnancy by women (the only precaution I've seen is to wait until the second trimester if you've had previous miscarriages). I have a feeling your IUD was expelled because of the fetus, not the RRL tea (just my semi-medical opinion).

I've read about cramp bark but as I'm a tea lover (and someone who has trouble swallowing things that taste bad) I think I'll probably start with the raspberry leaf. Thanks for your input though!