I just read this on another board and although the poster wasn't entirely sure it was true, I found it interesting and just thought I'd throw it out there in case anyone has any more knowledge and is willing to agree or refute. The poster has had 5 pregnancies, only one of which resulted in a live birth, and was given a different reason for each. Her most recent was a mmc at 12 weeks, fetus measured 8 weeks. She said that it was most likely chromosomal as an immunity issue would result in an immediate mc instead of missed.
Any one have any insight?