I do have my boys scan pics and i have been comparing them, i will try and post them later for comparison. DS1 skull deffo looks like a caveman skull to me. DS2 is flatter and DS3 is a very grainy scan and cant really see the shape of skull.
I think it is a fun way to guess and i will be amazed if it is correct. Can't imagine i will be so lucky to get a girl though. x