Hi Vicky. Answering your question, my adult son had no developmental problems but he did have GHD, and I was definitely told it was because of his kidney disease. We are all short at home so I was never concerned about his height in his early childhood. But then he hardly grew, if at all, from ages 10 to 12. His bone age (9), obtained by a simple hand X-ray when he was 12 years old, showed that he was 3 years delayed from his real age, so that he did have room to grow. So he took growth hormones from age 12 to 18. During these 6 years he grew slowly but steadily around 8 cms. per year (his feet grew quickly first and his shoe size is now size 12!). He is now 173 cms (around 5' 8" or 5'9" ), which is very tall in our family. According to an unrelated bone x-ray at age 18, it seems he still had some room to grow, but he stopped taking the growth hormone as he was very happy with his height and was tired of having shots 6 days a week, specially going away to university. We will never know how much he would have grown without taking the hormones.
Again, a simple hand x-ray is all that is needed to know if there is room to grow or not. I have a short (healthy) daughter who had the test done twice, but her bone age turned out to be the same as her real age so nothing can be done about her height.
With the x-ray, they examine the spacing between the bones of the fingers. The wider the gap, the more years' difference with the real age (room to grow) there is.
Hope this info. helps.