The first time after abortion, the amount of menstruation is very small is not a normal phenomenon, belongs to an abnormal phenomenon, you need to go to the hospital to carry out relevant examinations to clarify the specific causes, to determine what causes the menstruation is small, the possible causes are as follows: a. After abortion, the endocrine has not fully recovered and stable, resulting in thin endothelium, the amount of menstruation may be less, it is recommended to go to the hospital to check the hormone six and ultrasound, to clarify the specific causes and carry out symptomatic treatment. It is recommended to go to the hospital to check the hormone six and ultrasound to clarify the specific causes and then carry out symptomatic treatment. After abortion, the basal layer is damaged and the endometrium is not fully recovered, resulting in adhesions in the uterine cavity, resulting in low menstrual flow.