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IUDs are now used by more than 15% of US contraceptors. The majority of these IUDs release the progestin levonorgestrel (LNG). Extended use of IUDs allows users to continue their intrauterine contraception with fewer removal and insertion procedures. Two recently published clinical trials assessed the extended use of full-size IUDs which contain 52 mg of LNG, with brand names Mirena or Liletta.

The data from these trials confirm that Mirena and Liletta remain highly effective through 8 years of use. Recently, Mirena was approved for up to 8 years of use, and before the end of 2022, the FDA is expected to also approve Liletta for up to 8 years.

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