The estimates on size are often wrong anyway. I was told with DS1 at an antenatal check at 36 weeks (before the GD trend many moons ago) that the baby was really big and if I didn't go into labour on my own in the next 2 weeks I would have to have a c/s because there was no way I could birth such a big baby on my own. Well I went into labour on my own at 39+2, and birthed a 6lb 4oz baby. Huge NOT! LOL With DS2 I was told he was probably going to be about the same size as DS1, wrong again, he was 8lb 1oz so it seems these size estimates are not spot on at times anyway.