Study Purpose: This study aims to understand how well SKYTROFA (lonapegsomatropin), a growth hormone treatment, works and how safe it is for people who have a condition called growth hormone deficiency. This means their body doesn't make enough growth hormone, which is important for growing taller and developing properly. The study will look at how patients do over a long time while using SKYTROFA as part of their usual medical care. Patients will not have to go to extra doctor visits or take extra tests for this study, except for some surveys called COAs (Clinical Outcome Assessments) that help researchers understand patient experiences.

• The study is non-interventional, meaning no extra treatments or tests are needed beyond normal care.
• Only patients already using SKYTROFA in the USA can join.
• Patients in other clinical studies cannot participate.