I've got a sexing scan tomorrow to find out if the thing making my belly so large already is a boy or a girl!
I've been guessing all along from old wives tales (I know that's all they are) and my latest guess is from looking at my first child's 20w scan compared to this one for the skull theory - the heads look the same on both so I am assuming we're having a second boy- if you looked at skull theory with your scan was it correct?