A copper intrauterine device (IUD) is a small, T-shaped device made of plastic and copper that is inserted into the uterus by a healthcare provider. It works primarily by releasing copper ions, which create an environment that is toxic to sperm, preventing fertilization. The IUD can provide long-term contraception, lasting up to 10 years, and is a reversible method of birth control. The copper IUD is a non-hormonal option, making it suitable for individuals who prefer to avoid hormonal contraceptives. It can be used by women of various ages and is effective immediately upon insertion. Regular check-ups are recommended to ensure proper placement and to monitor for any potential complications.