With this report, the authors aim to provide an up-to-date and comprehensive overview of the use of sexual and reproductive health services by adolescent women aged 15–19 in the developing world. Using reliable nationally representative surveys in 70 countries, the report presents 30 indicators that cover a wide range of topics related to the sexual and reproductive health of adolescent women. Chapter 2 outlines the methods and data sources used for this report. Chapter 3 focuses on marriage, sexual activity and contraception. The emphasis in Chapter 4 is on condom use, access to testing for HIV and treatment of STIs. Chapter 5 provides information on childbearing and a synthesis of the literature on abortion among adolescents in the developing world. Chapter 6 presents key indicators on maternal and newborn health care. The authors conclude with a chapter on recommendations and future actions, based on the evidence presented.