Hello there ....
I had a large (9cm diameter) SCH during my pregnancy, and my little babygirl arrived safe and sound about 4 weeks ago. The SCH rollercoaster all depends on size and location.
You are more than welcome to e-mail me if you need to talk advice etc.
Also there is an AWSOME and very active support group on yahoo groups., just surch under sub chorionic....
/ Helena