Which statement best describes Mirena, a hormonal intrauterine device?

Which statement best describes Mirena, a hormonal intrauterine device?

• A. It releases progestin to prevent ovulation.
• B. It releases estrogen to thin the uterine lining.
• C. It releases copper to block sperm.
• D. It is a non-hormonal device.

Answer: (A)

Mirena is a hormonal intrauterine device that releases a progestin (levonorgestrel) into the uterus. This progestin creates several pregnancy-preventing effects: it thickens cervical mucus to block sperm from reaching the uterus, and it thins the endometrial lining, making implantation less likely. In many users, it can also suppress ovulation in some cycles, adding to its effectiveness. It does not release estrogen or copper, and it is not non-hormonal. So describing it as releasing progestin to prevent ovulation best reflects its hormonal action and how it prevents pregnancy.

Mirena is a hormonal intrauterine device that releases a progestin (levonorgestrel) into the uterus. This progestin creates several pregnancy-preventing effects: it thickens cervical mucus to block sperm from reaching the uterus, and it thins the endometrial lining, making implantation less likely. In many users, it can also suppress ovulation in some cycles, adding to its effectiveness. It does not release estrogen or copper, and it is not non-hormonal. So describing it as releasing progestin to prevent ovulation best reflects its hormonal action and how it prevents pregnancy.