 We, the researchers, are following the natural history of Albright hereditary osteodystrophy. We have found that growth hormone deficiency is very common in patients with pseudohypoparathyroidism type 1a, which falls under the broader condition termed Albright hereditary osteodystrophy. Patients with pseudohypoparathyroidism type 1a typically are short and obese. Some of these patients are not short during childhood, but due to a combination of factors, they end up short as adults. We are evaluating the effect of growth hormone treatment in those patients with pseudohypoparathyroidism type 1a who are found to be growth hormone deficient or those who are growth hormone sufficient and were found to have a positive clinical response to growth hormone in a prior clinical trial under R01 FD003409, IND 67148 or those who meet the criteria of idiopathic short stature or SGA. 