Hi,
I have just read your post. I too have had multiple mc's (7 in total ranging from 4 wks to 13weeks)...we were not able to have any testing done for various reasons and decided to go down the IVF path and thus they have done a heap of test on us to see if we can get an answer, we only just found out last week that i tested positve to ANA Antibodies and Lupus..both are blood clotting disorders and also means that my cells attack good and bad cells..eg the embryo.
Its work asking your doctor to test for Antibodies...at least if it is negative its one thing to eliminate...i really recommend having a good doctor we are so fortune to have a great Fertility Specialist and OB so i feel we are in good hands.
Good luck