1. Meirik O, Fraser IS, d'Arcangues C. Implantable contraceptives for women. Hum Reprod Update. 2003 Jan-Feb. 9(1):49-59
2. MedWatch The FDA Safety Information and Adverse Event Reporting Program Accessed 2-13-12. Norplant
3. Abraham M, Zhao Q, Peipert JF. Young Age, Nulliparity, and Continuation of Long-Acting Reversible Contraceptive Methods. Obstet Gynecol. 2015 Oct. 126 (4):823-9