Mirena (hormonal IUD)
Mirena (hormonal IUD)
Mirena is a hormonal intrauterine device (IUD) that's inserted into the uterus for long-term contraception. A T-shaped plastic frame that releases the hormone progestin, Mirena thickens the cervical mucus and thins the lining of the uterus (endometrium) — preventing sperm from entering the fallopian tubes. Mirena also partially suppresses ovulation. After insertion, Mirena's plastic strings protrude from the cervix.
Mirena is the only hormonal IUD that has Food and Drug Administration (FDA) approval in the U.S.
Mirena prevents pregnancy for up to five years after insertion. Mirena doesn't offer protection from sexually transmitted infections (STIs).
Mirena is a hormonal intrauterine device (IUD) that's inserted into the uterus for long-term contraception. A T-shaped plastic frame that releases the hormone progestin, Mirena prevents pregnancy for ...
Why it's done
Mirena offers effective, long-term contraception. Among various benefits, Mirena:
Mirena isn't appropriate for everyone, however. Your health care provider may discourage use of Mirena if you:
In addition, tell your health care provider if you have:
Side effects associated with Mirena include:
It's also possible to expel Mirena from your uterus. You may be more likely to expel Mirena if you:
Mirena doesn't offer protection from sexually transmitted infections (STIs).
An estimated 1 out of 100 women who use Mirena for one year will get pregnant. If you do conceive while using Mirena, you're at higher risk of an ectopic pregnancy — when the fertilized egg implants outside the uterus, usually in a fallopian tube. Removing Mirena during pregnancy poses a risk of miscarriage. However, the risks of leaving Mirena in place during pregnancy are greater, including miscarriage, premature delivery, infection and septic shock.
In addition, your health care provider may recommend removal of Mirena if you develop:
How you prepare
Your health care provider will evaluate your overall health and do a pelvic exam before inserting Mirena. Talk to your health care provider about any medications you're taking, including nonprescription and herbal products.
You can have Mirena inserted anytime during your menstrual cycle if you've been consistently using another birth control method or you haven't had sex since your last period. If you have Mirena inserted more than seven days after the start of your period, use backup contraception for one week. If you're breast-feeding, have irregular periods or haven't been consistently using birth control, you may need to take a pregnancy test before Mirena is inserted.
What you can expect
Mirena is typically inserted in a health care provider's office.
During the procedure
During Mirena insertion, you may experience dizziness, fainting, low blood pressure or a slower than normal heart rate (bradycardia). It's also possible for the IUD to perforate the uterine wall or cervix.
After the procedure
After the procedure
Mirena can remain in place for up to five years. To remove Mirena, your health care provider will use forceps to grasp the device's strings and gently pull. The device's arms will fold upward as it's withdrawn from the uterus. Light bleeding and cramping is common during removal. Rarely, Mirena may become embedded in your uterine wall. If this happens, you may need local anesthesia and cervical dilation to have the device removed.
While you're using Mirena, contact your health care provider immediately if you have:
It's also important to contact your health care provider immediately if you think Mirena is no longer in place. Signs and symptoms that you've partially or completely expelled Mirena include:
Your health care provider will check the location of Mirena and if it's displaced, remove it if necessary — either by hand or with the help of a thin tube equipped with a camera lens and light (hysteroscope). If Mirena or its strings aren't visible, you may need an ultrasound and X-ray to confirm that Mirena isn't in your abdomen or pelvis. If you want to have a new IUD inserted, you may need to take a pregnancy test first.
Insertion of Mirena
Mirena is a hormonal intrauterine device (IUD) that's inserted into the uterus by a health care provider. Mirena prevents pregnancy for up to five years. ...
Last Updated: 2010-01-23
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