The main difference between the IUD and the removal of the IUD is the purpose. The IUD is used for contraception, and in a small number of women, it is used for the treatment of certain gynecological diseases, such as excessive menstruation and endometriosis. The IUD is removed when there is no need for contraception, or when the IUD has reached the end of its useful life, to avoid the side effects of the IUD. The procedure is basically similar, with the difference that the IUD is delivered into the uterine cavity with a fork and removed with a hook. There are certain requirements for the time of IUD insertion and removal, usually 3-7 days after menstruation. However, for women who conceive with the ring, the birth control ring can be removed directly at the time of abortion. For women with irregular uterine bleeding, the ring can be removed at any time when a diagnostic scraping is needed, and the scraped tissue can be sent for examination in order to rule out the problem of endometriosis. For perimenopausal women, it is best to remove the ring within six months of menopause.