HOME MEDICAL ENCYCLOPEDIA ONLINE TOOLS HEALTH INFO
intrauterine device

Images (Click to view larger image)
  • Intrauterine devices (IUDs)

Blaussen Videos
IUD Movie

Alternative Names
IUD

Definition

An intrauterine device (IUD) is a small device that is placed within the uterus to prevent pregnancy. Most IUDs are made of plastic and contain either copper or a hormone known as progestin. A healthcare professional inserts the IUD when the woman is having her menstrual period. Copper IUDs can be left in the uterus for up to 10 years before they need replacement.

What is the information for this topic?

There are two ways an IUD prevents pregnancy. First, it creates a hostile environment for the sperm to travel through on the way to fertilize the egg. The IUD also prevents the fertilized egg from attaching to the walls of the uterus. IUDs are 97.4 to 99.2% effective in preventing pregnancy.

What are the indications for an IUD?The IUD is thought to be a good choice for a woman who:

What are contraindications to using an IUD? IUDs should not be used by women who have:

A birth control method other than an IUD, should be used by women who:

What are the risks of an IUD?A woman who uses an IUD may experience:

In addition, the mechanisms of action of an IUD should be explained by the healthcare professional to a woman who is considering using the device. Women who believe life begins at conception may not be comfortable using a method of birth control that can, even infrequently, prevent an embryo from implanting in the uterus, and thus to be lost. This post-fertilization effect may occur with an IUD.


Author:Eva Martin, MD
Date Written:11/11/99
Medical Review:Gaylen Kelton, MD
Date Written:10/24/2006
Reviewer:Reginald Finger, MD
Date Reviewed:2/1/2007
Contributors
Potential conflict of interest information for reviewers available on request