Which contraceptive method uses a hormone-releasing intrauterine device (IUD)?

• A. Copper IUD
• B. Levonorgestrel IUD
• C. Barrier methods
• D. Implantable rod

Answer: (B)

The correct answer highlights the Levonorgestrel IUD, which is a type of hormone-releasing intrauterine device. This device is designed to prevent pregnancy by gradually releasing levonorgestrel, a synthetic progestin, directly into the uterine cavity. The hormone thickens cervical mucus, making it difficult for sperm to enter the uterus, and it also thins the uterine lining, which helps to prevent implantation of a fertilized egg.

The key distinction of the Levonorgestrel IUD is its hormonal mechanism of action, which provides a highly effective long-term contraceptive solution, often lasting for several years with minimal intervention. In contrast, other methods mentioned do not utilize hormonal regulation to prevent pregnancy. For instance, the Copper IUD operates without hormones but instead relies on the spermicidal effect of copper. Barrier methods aim to physically block sperm from reaching the egg, while implantable rods, although hormonal, are not categorized as intrauterine devices. The specificity of the question regarding hormone release within the context of an intrauterine device clearly points to the Levonorgestrel IUD as the correct choice.