Intrauterine device (IUD)
An intrauterine device (IUD) is a method of birth control that is placed inside the uterus to prevent pregnancy.
All IUDs have a plastic string that extends through the opening of the cervix into the vagina. The string allows a health professional to remove the device at your request or at the end of its effectiveness (usually anywhere from 3 to 12 years, depending on the type). Talk to your doctor about how long you can use it.
The IUD is very effective at preventing pregnancy.
Current as of: April 18, 2023
Author: Healthwise Staff
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Ti AJ, et al. (2020). Effectiveness and safety of extending intrauterine device duration: A systematic review. American Journal of Obstetrics and Gynecology, 223(1): 24–35.e3. DOI: 10.1016/j.ajog.2020.01.014. Accessed August 29, 2022.