Birth control ring. Planned Parenthood. https://www.plannedparenthood.org/learn/birth-control/birth-control-vaginal-ring-nuvaring. Accessed February 2018.
Nuvaring package insert. https://www.nuvaring.com/. Accessed February 2018.
Choosing a birth control method. Association of Reproductive Health professionals. http://www.arhp.org/Publications-and-Resources/Quick-Reference-Guide-for-Clinicians/choosing/Vaginal-Ring. Updated June 2014. Accessed February 2018.
The American College of Obstetricians and Gynecologists Guidelines for Women’s Health Care: a resource manual. 4th ed. September 2014.