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Review
. 2009 Apr;23(2):199-209.
doi: 10.1016/j.bpobgyn.2008.11.008. Epub 2009 Feb 14.

Understanding contraceptive failure

James Trussell  1
Affiliations
Review

Understanding contraceptive failure

James Trussell. Best Pract Res Clin Obstet Gynaecol. 2009 Apr.

Abstract

Contraceptive failure is a major source of unintended pregnancy. This chapter will review sources of data and measurement of contraceptive failure, summarize results from the literature on the risks of contraceptive failure during typical and perfect use for available methods of contraception, provide a tool for communicating risks of contraceptive failure to clients, examine determinants of contraceptive failure, and identify methodological pitfalls in the published literature.

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Figures

Figure 1
Figure 1
Comparing typical effectiveness of contraceptive methods
See this image and copyright information in PMC

References

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    1. Trussell J. Contraceptive efficacy. In: Hatcher RA, Trussell J, Nelson AL, et al., editors. Contraceptive Technology. 19. New York: Ardent Media; 2007. pp. 747–826.
    1. Steiner MJ, Trussell J, Mehta N, et al. Communicating contraceptive effectiveness: a randomized controlled trial to inform a World Health Organization family planning handbook. Am J Obstet Gynecol. 2006;195:85–91. - PubMed
    1. Steiner MJ, Trussell J, Johnson S. Communicating contraceptive effectiveness: an updated counseling chart. Am J Obstet Gynecol. 2007;197:118. - PubMed