The blood flow signal does not necessarily require evacuation, as the need for evacuation can only be determined by the amount of residue left in the uterine cavity. If the residue in the uterine cavity is larger than 1 centimeter, and the residue is relatively large, it is recommended that the uterus be cleared. Because there is no way for medicines to help the residue to be drained out, if the uterus is not cleared in time, it will cause infection in the uterine cavity, and even pelvic inflammatory disease, endometritis, and tubal inflammation will occur. If the blood flow signal in the uterine cavity is small and the residual is low, under 1cm, you can take oral medicines, such as the medicines of activating blood circulation and removing blood stasis such as New Biochemistry Pellet, Mifepristone, Motherwort Herb Combination, Blood Materia Medica Capsules, all of them can help to discharge the residual in the uterine cavity, and sometimes it will be returned to normal slowly with one period. However, it is equally important to have an ultrasound review at 7-10 days of oral medication to determine if it has been expelled.