This report presents a comprehensive overview of the sexual and reproductive health experience of married adolescents in Nigeria, with a primary focus on the North East of the country where 59% of girls aged 15-19 are married. With young girls, sometimes as young as ten, entering into marriage there are serious pregnancy-related health issues to address. This report argues that married adolescents represent a particularly vulnerable group; often married at the behest of their family, they enter into a particularly asymmetric power-dynamic with a usually significantly older man. This can make it difficult to demand contraception, exposing girls to the risk of HIV infection. Girls married young are also removed from school, resulting in missed opportunities in education and employment. The report goes on to describe the social context in which married adolescents live, as well as a detailed analysis of sexual behaviours, marriage, childbearing, HIV experiences and the unmet need for contraception. Recommendations include stronger implementation of government policies (such as commencing the National Reproductive Health Policy and Strategy to Achieve Quality Reproductive Health for all Nigerians), a focus on education and the need to persuade and facilitate parents to retain daughters in school.