I have heard so many stories of women being told that their babies will be big and then when the babies are born they are within normal weight ranges. I think scan's can give you an "idea" but not super accurate. In the last few weeks weight gain is so varied depending on the baby and they go through so many growth spurts in the third trimester that it is hard to gauge how much more they will or will not grow.

I was just told at the scan last week that this baby was big and that she weighed over 4 pounds at 28 weeks. But then again I was told Matilda was a heavy baby at 8lb 15oz which is a pretty normal weight anyway...