To assess the quality of adolescent-and youthfriendly health services (AYFHS) at 65 service delivery points in Zou, Benin, a 15-item quality assessment (QA) checklist was implemented to measure adherence to AYFHS standards. n Quality improvement initiatives and supportive supervision were implemented to address service delivery, contraceptive availability, and provider bias and proved to be effective mechanisms in boosting the quality of AYFHS after the first QA cycle and the use of contraceptive services.n Due to the COVID-19 pandemic that occurred between the second and third QA cycles as well as internal factors, many service delivery points regressed in scores.