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Risks
By Mayo Clinic staffUsing the rhythm method to promote fertility doesn't pose any risks.
Likewise, using the rhythm method for birth control doesn't pose any direct risks — but it doesn't offer protection from sexually transmitted infections. In addition, the risk of unintended pregnancy with the rhythm method is somewhat higher than with other methods of birth control. Although effectiveness varies, in the first year of typical use an estimated 13 to 25 out of 100 women practicing the rhythm method for birth control will get pregnant.
References
- Jennings V. Fertility awareness-based methods of pregnancy prevention. http://www.uptodate.com/home/index.html. Accessed Sept. 23, 2011.
- Pallone SR, et al. Fertility awareness-based methods: Another option for family planning. Journal of the American Board of Family Medicine. 2009;22:147.
- Jennings V, et al. Fertility awareness-based methods. In: Hatcher RA, et al. Contraceptive Technology. 20th ed. New York, N.Y.: Ardent Media; 2011:417.
- Zieman M, Hatcher RA, et al. A Pocket Guide to Managing Contraception. Tiger, Ga.;2010:94
- Birth control methods: Frequently asked questions. U.S. Department of Health and Human Services. http://www.womenshealth.gov/faq/birth-control-methods.pdf. Accessed Sept. 23, 2011.
- Centers for Disease Control and Prevention. U.S. medical eligibility criteria for contraceptive use, 2010. MMWR. 2010;59(RR-4):1. http://www.cdc.gov/mmwr/preview/mmwrhtml/rr59e0528a1.htm. Accessed Sept. 23, 2011.
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