The research aims to assess early marriage and fertility-decision-making among Rohingya refugees in Bangladesh and internally displaced persons (IDPs) in Yemen. Building on child marriage studies we conducted among these populations in 2019, the study will 1) explore how conflict and displacement affect demand for early marriage and childbearing; 2) understand how fertility intentions and fears of sub-fecundity affect use of SRH services; 3) build the evidence base for adolescent SRH programs and policies in humanitarian settings.