It was explained to us by the Cheif of pediatrics at Yale New Haven Hospital as well as a couple of other endos.

This might not have been explained to you as your child has full blown CAH.  If any of your other siblings are carriers then the subject might come up.

Remember, I am not a MD but I do a lot of research on these subjects.  This is part of what the study is trying to explain and get a handle on.