Kidney
Chronic renal disease is when there is a gradual loss of kidney functionality. A child that does not receive a kidney transplant can end up with chronic, permanent renal failure. Children that have renal disease often experience growth retardation. Human growth hormone can help a child grow in a natural way while they are suffering with the renal disease. After a transplant, growth generally improves when the body's organs begin to function normally again. The anti-rejection drugs that must be taken after a transplant can further interfere with the normal growth process. So it is for these reasons, that many parents turn to HGH for treatment after a transplant.