Manhart, M.D., Duane, M., Linda, A., Sinai, I., Golden-Tevald, J. Fertility awareness-based methods of family planning:A review of effectiveness for avoiding pregnancy using SORT. Osteopathic Family Physician 2013,5(1),2-8.
Key Results
Marquette, SDM, and TwoDay scored best for evidence quality.
Conclusion
Development and application of criteria to evaluate the quality of evidence within SORT reveal that contemporary FABM can be as effective as hormonal contraceptives without the inherent health risks.