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Best Pract Res Clin Obstet Gynaecol. 2010 Aug;24(4):443-55. doi: 10.1016/j.bpobgyn.2010.02.002. Epub 2010 Mar 23.

Why do women experience untimed pregnancies? A review of contraceptive failure rates.

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  • 1Department of Obstetrics and Gynaecology, University of Sydney, NSW, Australia. k.black@usyd.edu.au


Contraceptive failure contributes to a substantial proportion of unintended pregnancy, particularly in the developed world. A number of socio-demographic factors seem to impact on the risk of a woman experiencing contraceptive failure. Many of the issues exist across cultural boundaries and are complex to address. In discussing the failure rates for individual contraceptive methods, this article will highlight the advantage of improving uptake of long-acting reversible methods of contraception which have a high efficacy and are less user-dependent than many of the other available methods.

2010 Elsevier Ltd. All rights reserved.

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