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Increased body mass index and reduced efficacy of oral emergency contraception: how many women might be affected?
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Oral emergency contraception (EC) is available as levonorgestrel and ulipristal acetate. In England, EC is available through a variety of settings and can be obtained without a prescription. In 2014, evidence from clinical studies prompted a review of available evidence by the European Medicine Agency's Committee for Medicinal Products for Human Use to assess whether increased bodyweight reduces the efficacy of EC. The review concluded that the available data were inconclusive.1 ,2 However, if future research were to substantiate a relationship of reduced EC efficacy in women with higher bodyweight, it would be …