handedness and add | ADHD Information

just curious because have read/heard that prenatal factors can influence both add and handedness( and other things )Wifes parents are both left there kids are all 3 right.Wife can do both. Taught herself.Nelson kids both right.i can do anything with both but i can only write with my right hand. So i guess that's mostly right......or not......Non of my 2kids are ADDs yet---one is a lefty{F} and the other {M}is ambidextrous.I didn't vote b/c I'm kind of "mostly right" and kind of "ambidextrous;" although, if I didn't grow up in a "right-handed society," I do wonder if I would have been predominantly left-handed.