The decrease in menstrual flow after abortion surgery is certainly not normal and is an abnormal condition. If there are symptoms of low menstrual flow after abortion surgery, it is mainly due to the following reasons: First, poor recovery of the endometrium after abortion may lead to poor recovery of the endometrium, which is related to the damage to the endometrium from abortion surgery, and the slow and thin recovery of the endometrium will lead to reduced menstrual flow. Second, there may be a case of uterine cavity adhesion, the endometrial layer does not recover after abortion, resulting in the two sides of the muscle layer adhesion together or the gap between the endometrium and the muscle layer adhesion each other, thus leading to a reduction in the area of the uterine cavity, the amount of endometrium becomes less after the menstrual volume will also become less.