The failure rate of painless abortion is relatively low, and usually does not need to clear the uterus again. However, it does not rule out the need to remove the uterus if the abortion is incomplete. 1. Do not need to clear the uterus: painless visual abortion surgery is generally under anesthesia, screen monitoring, through the negative pressure suction device to carry out abortion surgery, also known as the clearance of the uterus. This surgical method is accurate in positioning, the chances of incomplete abortion are relatively small, so generally do not need to clear the uterus again. 2. Need to remove the uterus: special circumstances, such as the gestational sac is too small or too large or the placenta implanted into the myometrium, or the placenta implanted into the scar, etc., which may lead to incomplete abortion and need to remove the uterus again. In 7-10 days after the painless abortion surgery, you need to go for ultrasound review to confirm whether the abortion is clean or not. If you find any abnormalities or signs of incomplete abortion, you need to deal with them promptly. Painless abortion surgery requires doctors to develop a personalized diagnosis and treatment plan, if you feel unwell after abortion, you need to consult a doctor in time to clarify the cause of the disease and standardize the treatment, so as not to delay the condition.