My 2 year old son was diagnosed via cvs to have xyy syndrome. so far we haven't had too many problems although e was delayed with walking due to hypermobile joints. he had physio for six months & finally walked at 18months. es speach has also been delaye

XYY: I've followed the xyy business for decades because of a personal interest. The claim that these boys are natural criminals is rubbish. Tall is fun, acne is treatable, and assertive is good. Congratulations on being the parents of a son who'll probably bring you a great deal of happiness; if there are other problems, look for other causes.

XYY: Congratulations on your son's birth. I've followed xyy for decades, and the claim that these people are natural criminals is hogwash. They do tend to speak late, but so did some nobel prize scientists; nobody's reported hypermobile joints as a problem. Plusses include being tall and perhaps more assertive; acne's easy to treat nowadays. Take good care of junior, and cherish individuality.