Bette- I am so sorry to hear of your daughter's losses and hope this current pregnancy is successful. If she has been through all the standard blood and structural tests and nothing has been identified as a cause, and has any future unexplained complications, I strongly recommend consulting with the Alan Beer Center. They deal with maternal immune issues...
Glad you are feeling better after going gluten-free - it literally changed my life. I also self-diagnosed and felt amazing after 4 days. I had 5 unexplained first trimester miscarriages in the 2 years prior to that. I went to a nutritionist, gastroenteroligist and acupuncturist- all 3 said to take a year off before getting pg again but as I was pushing 4...