I've been reading the threads but have only participated here and there. I'm 20 weeks and found out I have a subchoronic hematoma...a large blood clot in my uterus. I had a good bit of heavy, bright red bleeding last week and I was really nervous. I had a lot of ultrasounds done (funny for someone who didn't want any ultrasounds!) and that's what the doctors finally decided on. Anyone else have this or have heard of it? It just appeared so I'm wondering if anyone knows what causes it and if anyone has heard of other women in their second trimester having this and what happened. The first doctor had me on bedrest but the second doctor told me bedrest would have no impact either way.