I'm so sorry Ally. Chemicals suck balls.
I'm a bit wary of any tests other than FRERs myself.
Sorry if I'm asking a dumb question or one that you've already mentioned, but have you guys considered having karotype testing etc, to see if there's something perhaps causing repeat chromosomal issues?
VicPark - a chemical is just a very early m/c. It usually just means the emby doesn't make it very far, due either to a chromosomal issue with the emby or perhaps the mother's immune system fighting off the emby.