In fact, in recent years, the use of the Manuelle ring has become more common, especially in tertiary care hospitals, and now the Manuelle ring can not only be used for contraception, but also for treatment. It is mainly a kind of levonorgestrel intrauterine slow release system, releasing 20μg of levonorgestrel daily to the endometrium, which can inhibit ovulation in some women; in addition to the local effect on the endometrium, it can make the glands atrophy and interstitial metaplasia, which is not conducive to the fertilization of eggs; in addition, it can also change the mucus of the cervix, making the mucus of the cervix become In addition, it can also change the mucus of the cervix, making the mucus thicker and less conducive to sperm penetration. The ring is widely used, not only for contraception, but also for the treatment of diseases, but the price may be a little more expensive, but the role of contraception and the role of the treatment of diseases is still relatively significant.