Intrauterine device. Definition

Medical Definition: Intrauterine device

Small plastic device in the form of T that is placed inside the uterus (the small, hollow, pear-shaped woman's pelvis) to prevent pregnancy. The IUD prevents sperm from fertilizing an egg and prevents fertilized eggs from implanting in the uterus. Also, IUD use is being studied to prevent and treat endometrial cancer and other conditions. Also called IUD.

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