When I had my scan the obs asked me if I could come back as some of the heart valve measurements weren't clear enough, but right at the end of the scan the baby moved and he was able to measure them. I was told that they were changing my due date to 3 days earlier based on the babies size. I know trying not to worry is much easier said than done but if something was seriously wrong they would have mentioned it to you while they were doing the scan. It's probably just to get the extra measurements as they may have missed a couple. I know my scan took about 45 minutes to complete. Not good when your suspose to have full bladder, lol.

Sharon