Heparin's a tricky one. Here's what our Medical Board
(composed of the top people who research preeclampsia) has said about it as a therapy recently: viewtopic.php?f=19&t=42978
I'm guessing this is what your MFM refers to: • Heparins have some anti inflammatory action and to the extent that preeclampsia is an immune activated disease process - they might be helpful - but largely without supporting data.
At the patient science/continuing medical education conference before Saving Grace last fall, a few of the doctors mentioned this study as a possible reason to avoid heparin: http://www.ncbi.nlm.nih.gov/pubmed/22082677
(the sFlt-1 molecule that it mentions has been implicated in preeclampsia)
and this recent study says it might not help regardless of whether or not it might harm: http://www.ncbi.nlm.nih.gov/pubmed/22289887Primary outcome was a composite end point of late-pregnancy complications. Analysis was by intention to treat. The study was stopped for futility at the time of the first planned interim analysis. Among the 128 women eventually available for final analyses, 13 of the 63 (21%) randomized to nadroparin compared with 12 of the 65 (18%) on medical surveillance alone progressed to the primary end point.
The Experts (the members of our medical board who answer questions on the Ask The Experts forum) seem to want to wait for a big trial currently in process before they say anything more, because the data we currently have aren't conclusive one way or the other.
It sounds like you had a placenta that was struggling to hang in there.
I really hope you and your doctors are able to find a plan that you're comfortable adopting!