Return-on-investment for interventions to reduce adolescent pregnancy and child marriage in Southeast Asia: a five-country modelling study

Adolescent pregnancy remains a concern in Southeast Asia, with pregnancy both a driver and an outcome of child marriage or union. For Cambodia, Indonesia, the Philippines, Lao People’s Democratic Republic (PDR) and Malaysia, this study aimed to calculate the benefit-cost ratio of investing in evidence-based interventions to prevent adolescent pregnancy and child marriage, considering their complex interdependencies.