It is normal to bleed within one week after spontaneous abortion. If the bleeding is longer than ten days or more, incomplete abortion and uterine cavity residue cannot be excluded. Therefore, if women have more vaginal bleeding or longer bleeding after spontaneous abortion, they should go to the hospital in time to have an examination and understand the condition of the uterine cavity by ultrasound to find out whether there is residual uterine cavity. If there is residue in the uterine cavity, it is recommended to carry out a timely clearance operation. If the residue in the uterine cavity is too long, it is easy to cause tissue mechanization, resulting in difficulty in tissue removal, which is more harmful to the endometrium of the woman, and some even need to be hospitalized for electrodesiccation. So whether it is spontaneous abortion or artificial abortion, the bleeding time after abortion will not exceed one week. If the bleeding continues for a longer period of time, it is an abnormal situation and needs to be dealt with promptly.