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    Did you mean emergency contraceptive pill?
    GlossaryLevonorgestrel (emergency contraceptive pill)

    synthetic hormone used in emergency contraception like Plan B

    Levonorgestrel is a synthetic hormone used in various forms of contraception, including emergency contraceptive pills like Plan B. It works by preventing ovulation, fertilization, or implantation of a fertilized egg, thereby reducing the chance of pregnancy if taken shortly after unprotected sex.

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