How does Mirena IUD work?
T-shaped and plastic, Mirena IUD slowly releases small doses of the hormone levonorgestrol into the lining of your uterus. It is inserted into your uterus by a healthcare professional. There is no single explanation of how Mirena IUD works to prevent pregnancy. The IUD may keep sperm from reaching and fertilizing eggs, thin the lining of your uterus, and stop your ovaries from releasing eggs. It is believed that the combination of these 3 actions help to prevent pregnancy.
