Natural family planning effectiveness: evaluating published reports

Adv Contracept. Jun-Sep 1997;13(2-3):155-65. doi: 10.1023/a:1006595703472.


Objective: To equip the reader with the tools necessary to evaluate studies of natural family planning (NFP) effectiveness found in the literature and to make recommendations for future NFP effectiveness studies.

Design: Current standards to evaluate contraceptive method effectiveness are reviewed. A framework for evaluating reports on NFP is presented.

Results: Most NFP studies found in the literature are flawed in design and do not calculate pregnancy rates correctly. The results from the few well-designed studies are presented.

Discussion: Many factors influence NFP effectiveness, and these factors must be considered when evaluating published studies and designing future studies.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.
  • Review

MeSH terms

  • Contraception
  • Evaluation Studies as Topic
  • Family Planning Services*
  • Female
  • Humans
  • Male
  • Natural Family Planning Methods*
  • Pregnancy