The IUD is a plastic intrauterine device with progestin, which inhibits the growth of the endometrium by slowly releasing progestin to achieve the purpose of contraception. 1. Weight gain: Because the IUD contains progestin, it may cause an increase in appetite or water and sodium retention, resulting in weight gain. 2. Bleeding: When the Mannorrhea ring is first placed, it may lead to irregular vaginal bleeding, which is usually small; 3. Pain: After the Mannorrhea ring is placed, it may stimulate the endometrium, leading to hidden pain in the lower abdomen; 4. Change in menstrual bleeding pattern: Because the Mannorrhea ring is used to achieve contraception by inhibiting the endometrium, it will lead to thinning of the endometrium, which may result in increased or decreased menstruation, or even amenorrhea; 5. Delayed follicular atresia: Because the Mannedrol ring acts locally by releasing progesterone, it can cause follicular rupture during ovulation, which can easily lead to delayed follicular atresia; 6. Ectopic pregnancy: No contraceptive measure is 100% contraceptive, and if pregnancy with the device after placing the Mannedrol ring, it will increase the risk of ectopic pregnancy. Attention should be paid to avoid strenuous exercise after the placement of the Manned Ring to avoid jamming and dislodgement of the ring body.