Mirena (hormonal IUD)


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Definition

By Mayo Clinic staff

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Photo of Mirena Mirena

Mirena is a hormonal intrauterine device (IUD) that's inserted into the uterus for long-term birth control (contraception). A T-shaped plastic frame that releases a type of progestin, Mirena thickens the cervical mucus to prevent sperm from reaching or fertilizing an egg. Mirena also thins the lining of the uterus and partially suppresses ovulation.

Mirena is the only hormonal IUD that has Food and Drug Administration (FDA) approval. Mirena prevents pregnancy for up to five years after insertion.

Why it's done
References
  1. Dean G, et al. Approach to intrauterine contraception. http://www.uptodate.com/home/index.html. Accessed Nov. 3, 2011.
  2. Kottke M. Nondaily contraceptive options: User benefits, potential for high continuation and counseling issues. Obstetrical & Gynecological Survey. 2008;63:661.
  3. Dean G, et al. Management of problems related to intrauterine contraception. http://www.uptodate.com/home/index.html. Accessed Nov. 3, 2011.
  4. Carusi DA, et al. Insertion and removal of an intrauterine contraceptive device. http://www.uptodate.com/home/index.html. Accessed Nov. 3, 2011.
  5. Mirena (prescribing information). Wayne, N.J.: Bayer Healthcare Pharmaceuticals Inc.; 2009. http://mirena-us.com/hcp/index.jsp?WT.mc_id=MIS119497&WT.srch=1. Accessed Nov. 8, 2011.
  6. Castellsague X, et al. Intrauterine device use, cervical infection with human papillomavirus, and risk of cervical cancer: A pooled analysis of 26 epidemiological studies. The Lancet Oncology. 2011;12:1023.
  7. Zieman M, et al. A Pocket Guide to Managing Contraception. Tiger, Ga.: Bridging the Gap Communications; 2010:82.
  8. Birth control methods fact sheet. U.S. Department of Health and Human Services. http://www.womenshealth.gov/publications/our-publications/fact-sheet/birth-control-methods.cfm. Accessed Nov. 3, 2011.
MY00998 Jan. 21, 2012

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