Most patients with natural miscarriages do not need uterine cleaning, as these patients usually have short pregnancy durations and the embryo expels itself. At this time, it is necessary to visit a hospital for an ultrasound to check the condition of the uterine cavity. Most women generally have nothing remaining in their uterine cavity. If there are some small amounts of residual embryonic tissue, one can take some blood-activating and stasis-resolving medications, and then strengthen uterine contractions to expel such tissues. A week later, a hospital check-up can generally confirm that the uterine cavity is quite clean, hence, uterine cleaning is not needed for a natural miscarriage.