Easypod United States User Trial

Inclusion Criteria: * Be male or female from 10 to 18 years of age, inclusive, with open epiphyses * Have GH deficiency diagnosed by treating pediatric endocrinologist for at least 6 months * Be undergoing rhGH treatment via self-injection using the Lilly Humatrope® or Pfizer Genotropin® pen injection device for at least 6 months * Be willing and able to comply with the protocol for the duration of the trial * Have access to the Internet * Be able to read, speak and understand English * If female of childbearing potential, have a negative urine pregnancy test at Screening and use an acceptable form of birth control during the trial, including abstinence, a hormonal contraceptive, intrauterine device, diaphragm with spermicide, or condom with spermicide Exclusion Criteria: * Known allergy or hypersensitivity to rhGH or prescribed diluent (0.3% metacresol for click.easy® cartridge) * Severe illness during the previous 6 months * Active malignancy (except non-melanomatous skin malignancies) * Diabetes mellitus (type I or II) * Pregnancy or lactation * Any medical condition that, in the opinion of the Investigator, would jeopardize the subject's safety following exposure to the investigational device * Participation in any other investigational study during the duration of participation in this trial