Inclusion Criteria:  Unilateral indirect inguinal hernia in males and females (0-18 years old) Healthy (based on history), non-athletes The guardian understands the purpose and risks of the study and signs the relevant informed consent  Exclusion Criteria:  Recurrent indirect inguinal hernia Incarcerated indirect inguinal hernia The ultrasonography shows contralateral patent processus vaginalis with other systemic diseases (such as chronic constipation, chronic cough, cardiopulmonary insufficiency, liver and kidney insufficiency, abdominal wall malformation, urinary tract malformation, etc.)