Professional and Linguistic Assessments Board (PLAB) Practice Exam

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For what purpose is mirena used?

Fertility enhancement
Menstrual regulation
Contraception
Hormonal replacement

The correct answer is: Contraception

Mirena is primarily used as a form of contraception. It is a type of intrauterine device (IUD) that releases a hormone called levonorgestrel, which prevents pregnancy by making it difficult for sperm to fertilize an egg and by inhibiting ovulation. The device also thins the lining of the uterus, which makes it less likely for a fertilized egg to implant. While Mirena can have secondary benefits such as helping with menstrual regulation and reducing heavy menstrual bleeding, its primary function remains contraception. The other options, such as fertility enhancement or hormonal replacement, do not accurately represent the main purpose of Mirena, as it is designed to prevent rather than promote fertility, and it serves a different role than typical hormone replacement therapies.