There are two types of IUDs available now, and both are considered very safe to use. Both IUDs are small, T-shaped, flexible plastic devices with threads at the end that are inserted into the uterus through the cervix by a health care professional.
The Mirena IUD is a hormonal device and the Paragard is a copper IUD. The Mirena IUD releases a small amount of progestin, which thickens cervical mucus, on a regular schedule and works by preventing sperm from joining an egg. This device is considered 99.8% effective in preventing pregnancy.
The copper IUD (Paragard) contains no hormones and also works by preventing sperm from joining an egg. Paragard is soft, flexible plastic, with copper wrapped around the ends of the T bar and the base of the T. This device is considered 99.2% effective. Continue reading