I was told that DD1 would be a larger baby but she arrived weighing 2.9kg (6lb7oz) to the surprise of the OB who exclaimed "Hmm more petite than I anticipated". Meanwhile DD2 was estimated to be about the same size as DD1 and arrived being a little pudding at 3.8kg (8lb6oz) !!! Once again to the OB's surprise.

FWIW - I was 6lb5oz at birth so DD1 was the size I anticipated but DD2 was much bigger, however most of her weight was fat, she had rolls of it!