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Intrauterine Device (IUD)

Intrauterine Device (IUD)

An intrauterine device (IUD) is a method of birth control that is placed inside the uterus to prevent pregnancy. It is not clearly understood how the IUD prevents pregnancy, and different types of IUDs may prevent pregnancy in different ways.

All IUDs have a plastic string that extends through the opening of the cervix into the vagina. The string allows a woman to check that the IUD is in place. It also allows a health professional to remove the device at the woman's request or at the end of its effectiveness (usually anywhere from 3 to 10 years, depending on the type).

The IUD is very effective at preventing pregnancy.

Current as of: June 4, 2014

Author: Healthwise Staff

Medical Review: Sarah Marshall, MD - Family Medicine & Femi Olatunbosun, MB, FRCSC - Obstetrics and Gynecology

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.

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