Background Adolescent pregnancies carry risks to the young mothers and the baby. Keeping girls in school can potentially protect girls from getting pregnant. In Zambia, 35% of young rural girls have given birth by the age of 18 years, and the pregnancy rates are particularly high among girls who are out-of-school. Approximately 50% of girls never enroll in secondary school. A number of studies have found that economic support to girls and/or their families can increase school enrolment and attendance, and three trials have found effects on postponement of childbearing and marriage. Other studies indicate that widespread myths and negative social norms are barriers to adolescent girls using modern contraceptives, thus contributing to high rates of early pregnancy. However, there is little robust research from Africa on how sexual and reproductive health programmes can be delivered in a way that actually affects early marriage and pregnancy rates.