For pregnancies that are not ectopic (normal pregnancies within the uterus), problems can still occur in women using Mirena
. If you desire to terminate the pregnancy, you can have Mirena removed, the pregnancy terminated, and a new Mirena inserted. If you desire to continue the pregnancy, you and your healthcare provider will face the difficult decision of whether to remove Mirena. Leaving Mirena in place throughout the pregnancy increases the risk of miscarriages, premature birth, and severe infections, and the fetus will continuously be exposed to the hormone in Mirena. Removal of Mirena is recommended, but this can also result in a miscarriage. It is not known if the constant exposure to levonorgestrel in Mirena increases the risk of birth defects or other problems.
Fortunately, pregnancy is rare in women who use Mirena. However, serious problems may occur if a woman becomes pregnant while using Mirena. For this reason, it is essential to let your healthcare provider know immediately if you are pregnant or suspect that you might be pregnant. Your healthcare provider can help you sort through your options and can diagnose any problems that may occur.