IUD stands for Intrauterine Device. It is a T-shaped device that is inserted into the uterus.
There are two types:
- Hormonal IUD
- Copper IUD.
1.) The Hormonal IUD contains hormones similar to the pill. It works in three ways:
- Preventing implantation of a fertilized egg in the uterus.
- Killing sperm before fertilization.
- Increasing cervical mucus to prevent sperm from reaching the egg.
2.) The Copper IUD works because the copper is toxic to sperm.
- It is also designed to work by preventing implantation1 [of a fertilized egg in the uterus].
If a person does experience implantation of a child in the womb, the IUD should be removed because it can cause a miscarriage or pre-term birth.
Note: Information on this website is intended to supplement, not substitute for the knowledge of your doctor, or other health care provider.
Sources: 1 Physician's Desk Reference (page 2409 of this year's updated book)
Two of the IUD’s that work in this manner are Mirena™ and Skyla™.