Pallone, S. R., & Bergus, G. R. (2009). Fertility awareness-based methods: another option for family planning. Journal of the American Board of Family Medicine : JABFM, 22(2), 147–157.
Key Results
The available evidence suggests that FABMs, based largely on assessing cervical mucous, can provide effective contraception.
Conclusion
Physicians should offer FABMs as a reasonable choice for family planning because there are no absolute contraindications.