Copper intrauterine device (IUD), also known as copper T , is a T -shaped contraceptive implanted into the uterus to prevent pregnancy. The non-hormonal IUD is the most commonly used method of reversible birth control. It is used by more than 150 million people worldwide and has an efficacy of 99.9%. It varies from the hormonal IUD, which releases the hormone progestin to prevent pregnancy. How do copper IUDs work? A copper T is a plastic device with copper wires coiled into it. Copper ions ... Get contact details & address of companies manufacturing and supplying Copper Intrauterine Device, Copper T , Intrauterine Devices across India. Learn all about the copper t female contraceptive, copper intrauterine device (IUD), copper coil, and how they work as effective birth control methods for women. Learn how a copper IUD works, how effective it is, what side effects it may cause, and how long it lasts. A copper IUD is a T -shaped device wrapped with copper that prevents pregnancy by creating a hostile environment for sperm.