Hi Gary, Our daughter is 4 1/2. We would be grateful if she was in the 10th percentile but she is below that. I have not heard much good coming out of the NIH study. I do not think I would go that route. Our Endo believes that she is growing on her own curve and that her growt rate is fine. If you have any concerns at all you should see another ENDO just to verify hir or her opinions. Your ENDO should have no problem with. Your child has to live with your decisions.