My six year old SWCAH has a 2 year delayed bone age also. This year they have decrease his cortef a bit and he has grown almost 6 inches. I have a bone age coming at his next appointment so I will be interested to see where he is now. My younger son 4 years SWCAH has a delayed bone age of only 6 months or so, I know the Drs. do not want an advcanced bone age.