Jan. 07, 2016
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  2. Barrier methods of contraception. American College of Obstetricians and Gynecologists. Accessed Oct. 28, 2015.
  3. Over-the-counter vaginal contraceptive and spermicide drug products containing nonoxynol-9; Required labeling. U.S. Food and Drug Administration. Accessed Oct. 28, 2015.
  4. Hatcher RA, et al. Vaginal barriers and spermicides. In: Contraceptive Technology. 20th ed. New York, N.Y.: Ardent Media; 2011.
  5. Zieman M. Overview of contraception. Accessed Oct. 28, 2015.
  6. Rohren CH (expert opinion) Mayo Clinic, Rochester, Minn. Oct. 29, 2015.