A Clinical Study of Long-Term Administration of Inpegsomatropin Injection in Participants With Idiopathic Short Stature Who Have Completed Phase Ⅲ Clinical Trials

This study is a multicenter, open-label, single-arm extension study to evaluate the safety and efficacy of long-term administration of Inpegsomatropin Injection in participants with Idiopathic Short Stature (ISS) who have completed Phase Ⅲ clinical trials. Upon completion of the Phase Ⅲ clinical study, participants may enter the extension-phase baseline assessment period after the participant and their guardian provide informed consent, based on the willingness of the participant and guardian as well as the investigator\'s comprehensive assessment of the benefit-risk profile for the participant\'s continued participation in this study. Participants who meet all inclusion criteria and do not meet any exclusion criteria will proceed to the extension-phase treatment period to receive continued treatment with Inpegsomatropin Injection. Upon completion of the treatment period, participants will enter the final-height follow-up period, during which growth and development status, medication exposure and safety will be followed up via outpatient visits. This study aims to observe the long-term safety and efficacy of the investigational product.