Has anyone had recurrent missed miscarriages or known people who have? I have a sono next week and am terrified there won't be a heartbeat again. My first miscarriage was spontaneous, but the second missed. I know I'm way over thinking it  but I can come up with lots of things that could be going wrong to cause recurrent spontaneous miscarriages (problems with the uterus or cervix, clotting disorders) but I feel like a missed miscarriage would truly just be bad luck.. Like a chromosomal issue or just an unviable pregnancy Does anyone know more about this?