Very interesting. I have a 3 half yo DS and everyone is telling me i am going to have a girl. I am still guessing a boy and am still unsure as to if i should find out next week at 12 week scan or not. Bubs last scan put heart beat at 140 ish, so if the theory is right i will be having another boy.....who knows i guess it has already decided so i'll just have to wait and see what the heart rate is next tuesday, or maybe i might just ask!!

Kas