Committee on Adolescent Health Care Long-Acting Reversible Contraception Working Group, The American College of Obstetricians and, Gynecologists (outubro de 2012). «Committee opinion no. 539: adolescents and long-acting reversible contraception: implants and intrauterine devices.». Obstetrics and gynecology. 120 (4): 983–8. PMID22996129. doi:10.1097/AOG.0b013e3182723b7d
Committee on Adolescent Health Care Long-Acting Reversible Contraception Working Group, The American College of Obstetricians and, Gynecologists (outubro de 2012). «Committee opinion no. 539: adolescents and long-acting reversible contraception: implants and intrauterine devices.». Obstetrics and gynecology. 120 (4): 983–8. PMID22996129. doi:10.1097/AOG.0b013e3182723b7d