What is a side effect of the Mirena intrauterine device?

• A. Increased menstrual flow
• B. Thickening of endometrial lining
• C. Change in hormonal levels
• D. Possible weight gain

Answer: (C)

The Mirena intrauterine device (IUD) is a hormonal contraceptive that releases levonorgestrel to prevent pregnancy. One of the notable effects of Mirena is its impact on hormonal levels, specifically by providing a localized hormone release through the endometrial lining, which results in various hormonal changes in the body. This can lead to alterations in menstruation and overall hormonal balance.

The subject of hormonal changes is particularly significant with Mirena, as it can influence progesterone levels, which may cause side effects such as irregular bleeding patterns or amenorrhea over time. Understanding this mechanism is crucial for healthcare providers when counseling patients about potential side effects and managing their expectations regarding menstrual changes and hormonal health.

While the IUD can lead to an environment that thickens the endometrial lining—another notable point—it primarily alters hormonal levels due to the continual release of levonorgestrel. While weight gain is a concern for some patients, it is not a universally accepted side effect directly correlated with the use of Mirena compared to the substantial and direct influence on hormonal levels.