Cervical dilatation during IUD removal is most often performed by the method of metal dilator separation. Under the supervision of ultrasound, the cervix is separated bluntly with a metal dilator in order of size, from thin to thick. The dilator is inserted into the cervical os to penetrate deep into the cervical canal to the uterus, and is passed back and forth with gentle pressure to form a channel. When the cervical opening is dilated to the width where the removal hook, hemostat, and other instruments can enter the uterus, the dilator is removed and the IUD is removed. For women with menopause, cervical atrophy or low estrogen status, low-dose estrogen can be used vaginally for about 1~2 weeks before IUD removal, and then dilated with the dilator. The specific operation should be carried out by a specialized physician.