Have just had my 20 week scan and the abdominal measurement was very large so they want me to go back in a week. They said it could just be that baby had swallowed lots if amniotic fluid so may well be back to normal next time they look - but I'm not sure what the alternative might be. my fundal height is on the large size too. Trying not to worry (and doing a good job i think....) but would be good to know if anyone else has experienced this and what the outcome was. Just want to be prepared with questions as necessary. Many thanks.