We went to the doctor yesterday, and had an anatomy scan done. We even got a 3D ultrasound of one of the baby's faces! It's pretty cool.
Anyway, her cervical length yesterday was better, but they saw something else. It seems a blood vessel is at the bottom of her left uterus, between the baby and the cervix. This can be a big problem - the vessel can rupture if the baby tries to come out, and can be very harmful to the baby. There's a chance she'll have to be in the hospital for the last month or two of the pregnancy.