Print By Mayo Clinic Staff Request an appointment About Feb. 10, 2023 Print Show references Hatcher RA, et al., eds. Fertility awareness-based methods. In: Contraceptive Technology. 21st ed. Ayer Company Publishers; 2018. Jennings V. Fertility awareness-based methods of pregnancy prevention. https://www.uptodate.com/contents/search. Accessed Jan. 11, 2021. Frequently asked questions. Contraception FAQ024: Fertility awareness-based methods of family planning. American College of Obstetricians and Gynecologists. https://www.acog.org/womens-health/faqs/fertility-awareness-based-methods-of-family-planning. Accessed Jan. 11, 2021. Simmons RG, et al. Fertility awareness-based methods of family planning. Best Practice & Research Clinical Obstetrics and Gynaecology. 2020; doi:10.1016/j.bpobgyn.2019.12.003. Pallone SR, et al. Fertility awareness-based methods: Another option for family planning. Journal of the American Board of Family Medicine. 2009; doi:10.3122/jabfm.2009.02.080038. AskMayoExpert. Contraception. Mayo Clinic; 2019. FDA allows marketing of first direct-to-consumer app for contraceptive use to prevent pregnancy. Food and Drug Administration. https://www.fda.gov/news-events/press-announcements/fda-allows-marketing-first-direct-consumer-app-contraceptive-use-prevent-pregnancy. Accessed Jan. 18, 2021. Related Products & Services A Book: Mayo Clinic Guide to a Healthy Pregnancy Basal body temperature for natural family planningAbout PRC-20393014 Patient Care & Health Information Tests & Procedures Basal body temperature