There are several reasons for very little bleeding after abortion: 1, the uterus contracts better and the lining is thinner, and the abortion is done better, in which case the bleeding may be less; 2, there is endometrial inflammation leading to uterine adhesions, but the adhesions are shorter, and the bleeding may be less when the adhesions are present. To determine the amount of bleeding after miscarriage, ultrasound needs to be rechecked in 7-14 days to rule out uterine residue. At the same time, HCG should be checked again, and after the first menstrual period, the amount and color of menstrual period should be checked to see if it is normal, and if there are any abdominal pain symptoms. If there is no such situation, it means that the abortion surgery is more effective; 3, if the amount of menstruation is relatively small, or the abdominal pain of menstruation is obvious, you need to be vigilant about the uterine cavity adhesion resulting in low bleeding, this situation needs to be rechecked to determine whether there is any uterine cavity adhesion hysteroscopy.