After hysteroscopic curettage, the Mannix Ring is placed 3-7 days after the next menstrual period. Generally speaking, about two weeks after hysteroscopic curettage, gynecological ultrasound is needed to determine whether there are still residues in the uterus. If there is no residue in the uterine cavity and the uterine lining recovers well, then you can wait for 3-7 days after the next menstrual period to place the Mannuelle ring, which has a higher probability of being placed successfully and is less likely to induce infection. After hysteroscopic curettage, some women may have complications such as adhesions in the uterine cavity or cervical canal, which may be manifested as low menstrual flow or absence of menstruation, and need to be treated in time, and the Mannuel Ring cannot be placed for the time being.