well when i had my m/c i asked the nurse why this had happened....i was 7 weeks when i m/c. I was told that most miscarriages under 12 weeks end becuse of genetic problems with the baby. she just said that some babies just arent meant to be on this earth. She wasnt mean or anything but that wasnt rally specific enough for me. But thats all i got! I blame myself nad my body for "not being good enough".
unless they do specific tests on you which im told if its your 1st m/c they wont depending obviously on how far along you were with the pregnancy. well in the uk thats what happens anyway.
hope it goes ok and you do get some answers although no amount of answers make it better. x

No doctor could tell me why either.Just something that happens to some people and something doesn't develop right for the baby.

If your path test came back fine and your rh positive then there really is no answer as to why you miscarried. I miscarried at 8 weeks and all my tests came back fine. The only real answer is that the baby and your body knew something was wrong so it ended the pregnancy. I know it's hard not to have a better answer than that, but unfortunately, the doctor can't provide one. I'm sure many doctors wish they could give you a better answer than that since i'm sure every woman who goes through this asks the same question you are. As hard as it is, I just put faith in my body and the baby that they knew this pregnancy wasn't right. In most cases, early miscarriages are due to genetic/chromosomal problems with the baby. I'm sorry this probably doesn't help, but just know that many of us have been through the same situation and we know exactly how you feel.