Spontaneous abortion usually occurs in the early stages of pregnancy, and the pregnancy sac that falls out of a spontaneous abortion is white, fleshy, or fish-foam-like tissue. If the tissue is placed in water, it will usually float to the surface. In most cases of spontaneous abortion, the sac is expelled relatively intact. However, there are a few spontaneous abortions that result in incomplete abortions, which can increase the risk of hemorrhage and infection. Therefore, it is generally recommended that patients who have already had a spontaneous abortion should have an ultrasound to find out how the uterus is recovering, and also to find out if there is any residue in the uterine cavity. If it is determined that the pregnancy sac has been expelled, after the abortion, it is necessary to use drugs to promote uterine contraction and repair the uterine lining. If there is an incomplete abortion, you need to do a purging operation.