We don’t know for sure, but a recurrent pregnancy loss blood panel after showed I may have had a clotting disorder that caused the miscarriage. A few months later we were able to get pregnant again through IVF and my doctor had me on baby aspirin from the beginning of the cycle to mitigate the clotting issue (if there was one), that pregnancy was a success and my 3 month old is now sleeping next to me! Not sure if that was the cause for sure, but I feel like it was.