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Emergency Contraception and Weight

Some forms of emergency contraception (EC) may not be as effective for heavier women. In particular, research studies have suggested that levonorgestrel (brand names Plan B One-Step® and Take Action™) might not be effective for individuals weighing more than 154 pounds, whereas ulipristal acetate (ella®) may only be effective up to 194 pounds. However, according to the American Society for Emergency Contraception (ASEC), these conclusions are based on very limited research and on studies that were not specifically designed to investigate the relationship between weight and effectiveness of EC.

Read WCSAP's Research & Advocacy Review by downloading the pdf below.

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Reviewed: April 22nd, 2016