Fertility Awareness Effectiveness

Natural family planning effectiveness: evaluating published reports

Lamprecht V, Trussell J

Published June 1997 Advances in Contraception : the Official Journal of the Society for the Advancement of Contraception, 13(2-3), 155-165
DOI 10.1023/a:1006595703472 PMID 9288333

Abstract

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.

Read the guide

  • Fertility Awareness Methods Compared

    Clinician-reviewed comparison of fertility awareness-based methods (Billings, Creighton, Sensiplan, Marquette, Standard Days, apps). Every effectiveness figure cited and labeled by metric.

    30 min read

Topics

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PMID 9288333 9288333 DOI 10.1023/a:1006595703472 10.1023/a:1006595703472 Lamprecht et al. 1997, Lamprecht 1997