Growth hormone (GH) has been used therapeutically for over 50 years. Since the development of a nearly unlimited supply of recombinant human GH in the mid-1980s, children with less severe GH deficiency can also profit from GH replacement therapy. Careful and accurate diagnosis and specific dosing, both essential to ensure normal height development, require the clinician to understand the finer points of clinical trials, to acquire quality evidence and assess the benefits of therapeutic int...