Sorry to hear about your recent loss Cricket. I had two miscarriages(5 weeks and 13 weeks) in a row a few years ago after three normal and healthy pregnancies and births. My second miscarriage had complications afterwards,they reassured me at the clinic that two is common and ok. When I was well enough to get pregnant again I was pretty scared and for the first time asked for an early scan, I was extremely anxious and had an incredible sonographer that cried with us as we spotted a heartbeat at 6 weeks. I would say after as many babies as you have had it would not be genetic. Are your cycles normal and healthy??