Mirena trademark (levonorgestrel-releasing intrauterine system) 52 mg

Important Safety Information

If you have a pelvic infection, get infections easily, or have certain cancers, don't use Mirena. Less than 1% of users get a serious pelvic infection called pelvic inflammatory disease (PID). If you have persistent pelvic or stomach pain or if Mirena comes out, tell your healthcare provider (HCP)... Continue below

Effective birth control without a daily pill

Mirena® is a hormone-releasing IUD that is over 99% effective at preventing pregnancy for as long as you want, for up to 5 years. Mirena can be used whether or not you have had a child. Mirena also treats heavy periods in women who choose intrauterine contraception.

What is Mirena?

Mirena is a small, T-shaped intrauterine device (IUD).

Placed into the uterus by a trained healthcare provider during an office visit

You should do a monthly thread check to make sure it's in place—ask your healthcare provider to explain how

Placement of Mirena is nonsurgical

Reversible, so you can have it removed at any time and try to become pregnant right away

Placement takes only a few minutes

You may experience pain, bleeding or dizziness during and after placement. If your symptoms do not pass within 30 minutes after placement, Mirena may not have been placed correctly. Your healthcare provider will examine you to see if Mirena needs to be removed or replaced.

Mirena IUD in hand up close

How does Mirena work to prevent pregnancy?

Mirena is an IUD that releases small amounts of a progestin hormone called levonorgestrel into the uterus.

Mirena may work in several ways:

However, it is not known exactly how these actions work together to prevent pregnancy.


Mirena® IUD placement

Mirena is one of the most effective low-maintenance birth control options

Generally, the less you have to do, the more effective the birth control method tends to be.

Mirena is birth control you don't have to think about taking every day or even every year. Once it’s placed, just do a monthly thread check to make sure it’s in the correct position. Ask your healthcare provider to explain how. If you don't feel the threads or feel more than just the threads, call your healthcare provider. Mirena may not be in the right position and may not prevent pregnancy. Use non-hormonal back-up birth control (such as condoms and spermicide) until your healthcare provider can check that Mirena is still in the right place.

Chart of birth control effectiveness
Did you know?
Mirena IUD in palm of hand
IUDs are considered one of the most effective forms of birth control by The American College of Obstetricians and Gynecologists (ACOG).