The Manned Ring can inhibit the growth of polyps in the endometrium, but it does not have a therapeutic effect on polyps that have already grown. This is because the Manned Ring contains a large dose of progestin, which is placed inside the uterine cavity to release such drugs, thus inhibiting the proliferation of the endometrium, so it is useful in treating endometrial polyps, as well as overgrown endometrium. However, when a woman already has endometrial polyps, a hysteroscopy or diagnostic curettage is needed to remove them and then perform pathological tests. Patients with endometrial polyps are often prone to recurrence, and to prevent recurrence, a Mannedol ring can be placed inside the patient’s uterine cavity, thus providing a preventive effect.