My ob (private) hasn't said anything to me about having to be scanned every time I see him - he usually offers though if I want one, we skipped the NT test and have been advised an additional detailed scan will be needed at 30 weeks due to bub showing signs of possible pyloric stenosis on my 19 week scan.

All he's said about my weight (and I am pretty big) is that he doesn't want me to gain any and it would be good for me and bub if I can try and lose a little but not to go crazy. He really doesn't seem that fazed by it.