Generally speaking, there is no good or bad IUD for women. According to the different shape of each woman’s uterus and the different adaptability to the IUD, the best IUD is the one that suits you. Generally, IUDs are categorized into T-ring, O-ring, Ai-Mother Ring, Ginny Soft, Ginny Zhimei, Man Yue Le and other different types of rings. If a woman is allergic to metal, she can have a plastic ring that contains less metal or no metal, such as the Fancy Ring. If a woman has adenomyosis, adenomyoma or abnormal thickening of the uterine lining, heavy menstrual flow, etc., and if the pathology suggests that the endometrium is benign after endometrial scraping, she can be given a MENUELE ring, which can treat both adenomyosis and endometrial pathology, and serve as a contraceptive. Therefore, each woman should have different types of rings according to her different needs.