A form of birth control, Intrauterine Devices (IUDs) are used by over 160 million people on a global scale (specifics as in 2002). These small 'T' Shaped device contain either progesterone or copper. These are inserted into the uterus of woman and act like a reversible contraception, which is termed as the highly effective form of reversible birth control. There are two type of Intrauterine Devices used viz Nonhormonal copper IUD – ParaGard and Hormonal IUD – Mirena. In United Kingdom, more than 10 types of copper Intrauterine Devices are used. Harmonal Intrauterine Devices (IUDs) are preferred as these decrease the bleeding.