I have a ten year old daughter that is a carrier, a six year old son that has SWCAH, and a 2 year old daughter with the less severe form of CAH.  My ten year old started developing last year so I had her tested because I felt maybe she was advancing towards puberty too soon. I wanted to make sure she did not have the less severe form like my 2 year old. She tested as a carrier only. But as you can see from my experience you can have children with different degrees of severity.