Our son is 16 and he is 5'2". The doctors are 99% sure he has reached his adult height. We were also told that genetics has alot to do with it. I am 5'1", and his father is 5'7". They assured us that the replacement of hydrocortisone, and fluorinef at the proper dose through out his growing years would enable him to grow to his potential. I'm not sure if this helps you, but you can email me if you like, Nkinn@msn.com