What is the primary use of an intrauterine device (IUD)?

The primary use of an intrauterine device (IUD) is for long-term contraception. IUDs are small, T-shaped devices that are inserted into the uterus to prevent pregnancy. They can be made of plastic, copper, or hormonal materials, and they are designed to provide effective contraceptive protection over a period that can range from several years up to a decade, depending on the type of IUD.

Copper IUDs work by creating a hostile environment for sperm, preventing fertilization, while hormonal IUDs release progestin to thicken cervical mucus and may also inhibit ovulation. This makes them a reliable option for individuals seeking a long-term method of birth control, as they require minimal maintenance after insertion and do not require daily attention, unlike oral contraceptives.

Other choices do not align with the primary purpose of an IUD. Hormone replacement therapy is used for managing menopausal symptoms. Menstrual regulation refers to procedures aimed at managing or altering menstrual cycles, and managing sexually transmitted infections (STIs) involves different interventions focused on treatment and prevention, not contraception.