Natural Family Planning: References

Guidelines for Women’s Health Care, A Resource Manual, 4th ed. 2014. American College of Obstetricians and Gynecologists.

Fertility awareness-based methods. Planned Parenthood. https://www.plannedparenthood.org/learn/birth-control/fertility-awareness. Accessed October 2016.

Centers for Disease Control and Prevention. Contraception. http://www.cdc.gov/reproductivehealth/contraception/. Update June 21, 2016. Accessed October 2016.