My OB never changed my due date bacuase of a hospital scan, but then we knew when we'd conceived to within a couple of days.

I had a scan at 36weeks which put my due date at 26/10/05. My actual EDD was 11/11/05, and DS was induced on 20/11/05.

At this time the radiographer said that ultrasounds are really not the best for estimating how big a baby will be, they very often overstate things.

DS was a heavy baby, but more becaude he was long, and a week and a half overdue. he wasn't a chubby bub.