The aim of this study is to look at the long-term safety and clinical parameters of somapacitan in paediatric participants with growth hormone deficiency under routine clinical practice conditions. The study population will include 400 paediatric growth hormone deficient participants from the Global Registry for Novel Therapies in Rare Bone and Endocrine Conditions (GloBE-Reg) treated with once-weekly somapacitan and fulfilling the eligibility criteria of the study. The total duration of the study is planned to 10 years consisting of a 5-year recruitment period in the GLoBE-Reg followed by a 5-year follow-up period.