My son has always been in the 50-75th percentile.  BUT when he reached 12 years, he started going through puberty (I thought it was alittle early but my endo said it wasn’t).  They did a bone scan then and he had a bone age of 14 - 15 years. It was about 1 1/2 years to 2 years ahead of his chroniolgical age.  We increased his meds but last February, the endo told us he was finished growing.  He was 14 years/3 months at the time and just under 5’6".  Since then he has grown less than 1/2 inch. I am afraid he might be done.  We had hoped to get him to 5’8". My husband is 6’2" and my older son is 6’3".  I don’t know if our endo and pediatrician use different charts.  He has always seemed to be in same percentile at each doctor’s office.  Last fall we tried the circadian dosing hoping to get him some more height but I think we tried it too late.  I wish we had know about it earlier.