There are usually no symptoms after the detachment of the IUD. If the IUD is used for contraception, the detachment may lead to pregnancy; if the IUD is used for the treatment of adenomyosis, the detachment may lead to excessive menstrual flow, incessant dripping and menstrual cramps. 1. Contraception: If the MENCI is used for contraception, there may be no symptom after detachment, but if there is regular sexual intercourse, it may lead to pregnancy. 2. Adenomyosis: If the IUD is used to treat adenomyosis, endometriosis, etc., it may lead to heavy and prolonged menstrual flow, constant dripping, and worsening of menstrual cramps when it is dislodged. If the IUD falls off during contraceptive use, you should go to the hospital for an individualized treatment plan.