Effectiveness of Emergency Contraception for Overweight Women Reviewed in Europe

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Effectiveness of Emergency Contraception for Overweight Women Reviewed in Europe

the European version of the U.S. Food and Drug Administration (FDA) â€" launched a broad review of whether body weight influences the ability of emergency contraceptives to prevent unintended pregnancies. The agency recently required makers of the European version of Plan B, called Norlevo, to add an alert that the product may be less effective for overweight women. The move was spurred by a 2011 study that found that women with a body mass index (BMI) greater than 25 who used levonorgestrel, which prevents pregnancy by blocking the release of the egg from the ovary, inhibiting fertilization or changing the uterine lining to discourage pregnancy, were four times more likely to get pregnant than women with lower BMIs.

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