Participants are free to decide if they want to take part in this study or not. The study will be conducted to collect information about the influence of adherence to growth hormone therapy with Norditropin® in children and teenagers in daily practice in Germany. This study will look mainly at the difference in near final height between children and teenagers who adhere to their therapy plan with Norditropin® to non-adherent patients. Participants will get Norditropin® as prescribed to them by their doctor. The study will last as long as the therapy with growth hormone is seen necessary by the participants' doctors and the participants, up to a maximum of 10 years. During the visits at the participants' doctors participants will be asked to fill in a questionnaire.