I too have an MTHR gene mutation. We had 4 miscarriages. We just recently carried a baby boy to 37 weeks. I was on Lovenox injections daily until 36 weeks. He died within a week of stopping. No heartbeat. The other babies all died between 8-10 weeks....heartbeat the first visit....not heartbeats the second visit. They cannot give me any explanations either. My heart goes out to you, as I have experienced the same as you. Don't give up...I'm not. Love and Hugs!