NFP Research

What is the evidence?

There have been numerous studies over the last 20+ years on Natural Family Planning and the Marquette Method. Listed below are some of the most relevant and recent research articles pertaining to the Marquette Method. We are pleased to teach this evidence-based form of Natural Family Planning.

Most Recent Marquette Method Effectiveness Study

Summary: This study showed 98% effectiveness of the Marquette Method in avoiding pregnancy with perfect use in non-breastfeeding women. 


Fehring, R. J., & Schneider, M. (2017). Effectiveness of a Natural Family Planning Service Program. MCN, The American Journal of Maternal/Child Nursing, 42(1), 43-49. doi:10.1097/nmc.0000000000000296

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Mother and Baby

Marquette Method Postpartum Effectiveness Study

Summary: With perfect use, this study showed 98% effectiveness of the Marquette Method for avoiding pregnancy during the transition to regular menstrual cycles postpartum. 


Bouchard, T., Fehring, R. J., & Schneider, M. (2013). Efficacy of a New Postpartum Transition Protocol for Avoiding Pregnancy. The Journal of the American Board of Family Medicine, 26(1), 35-44. doi:10.3122/jabfm.2013.01.120126

Marquette Method Effectiveness Study Among Perimenopausal Women 

Summary: The Marquette Method with hormonal monitor was 98.5% effective for preventing pregnancy among perimenopausal women with perfect use. 


Fehring, R. J., & Mu, Q. (2014). Cohort Efficacy Study of Natural Family Planning among Perimenopause Age Women. Journal of Obstetric, Gynecologic & Neonatal Nursing, 43(3), 351-358. doi:10.1111/1552-6909.12307

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Image by Alex Iby

Marquette Method Randomized Control Trial Study

Summary: The group using an electronic hormonal fertility monitor family planning method was more effective when compared with a cervical mucous monitoring group for avoiding pregnancy. 


Fehring, R. J., Schneider, M., Raviele, K., Rodriguez, D., & Pruszynski, J. (2013). Randomized comparison of two Internet-supported fertility-awareness-based methods of family planning. Contraception, 88(1), 24-30. doi:10.1016/j.contraception.2012.10.010

Marquette Method Achieving Pregnancy Study

Summary: For women who wish to achieve a pregnancy, using a hormonal fertility monitor alone offers to best natural estimate of a woman’s fertile phase of her menstrual cycle. Focused intercourse during 24 menstrual cycles can assist couples with achieving pregnancy. 


Bouchard, T. P., Fehring, R. J., & Schneider, M. M. (2018). Achieving Pregnancy Using Primary Care Interventions to Identify the Fertile Window. Frontiers in Medicine, 4. doi:10.3389/fmed.2017.00250

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