The main method of abortion in the 3rd month of pregnancy is medication, i.e. oral mifepristone combined with misoprostol for medication abortion. The specific dosing method is oral mifepristone, 150 mg/time, once/day on day 1-2, and oral misoprostol, 0.6 mg/time on day 3, which can be added after 4 hours if it is ineffective. 1-2 hours of fasting is required before and after the dosing. Before drug abortion, routine blood test, blood group test, vaginal discharge test, B-type ultrasound test, ECG, etc. need to be completed, and if there are abnormalities, other methods need to be taken to terminate the pregnancy. The water bladder can also be used to induce abortion in the third month of pregnancy. During the water bladder induction procedure, it is important that the water bladder does not touch the vaginal wall and should not be placed for more than 24 hours. 300-500ml of water should be injected, and the maximum amount should not exceed 600ml, and contractions should be closely observed and the water bladder should be removed in time.