Efetividade dos métodos contraceptivos durante a Adolescência
Extraído de Centers for Disease Control and Prevention, Division of Reproductive Health, CS 242797; adaptada de World Health Organization. Comparing typical effectiveness of contraceptive methods. Geneva, 2007, World Health Organization, and from Trussell J. Contraceptive failure in the United States. Contraception 83:397-404, 2011.