Ramzi theory, gender

What are your thoughts on the ramzi theory about finding out the gender? It definitely peaks my interest. On a vaginal ultra sound picture if your baby attached to the left side, it's 97% likely to be a girl, on right side of vag U/s a boy 97%. (With a reg stomach U/S it's the opposite). The ultra sound pic has to be a 6-8 week preg picture. Mine shows a girl, we will find out in oct. Any of you have proof of this theory?