The first period after abortion is particularly heavy, may be a normal phenomenon, but may also be due to endocrine disorders, uterine cavity infection, intrauterine residues and other reasons. 1. Normal phenomenon: after abortion, the female uterine lining will grow again to repair, there may be endometrial thickening phenomenon, which will cause the first menstrual period is relatively large phenomenon. 2. Endocrine disorders: After abortion, it may cause changes in hormone levels in the female body, resulting in endocrine disorders, which may also lead to increased menstrual flow. 3. Infection of the uterine cavity: After abortion, there is a possibility of infection of the uterine cavity, which may lead to endometritis, resulting in congestion and edema of the uterine lining, which may also cause increased menstrual flow. 4. Residuals in the uterine cavity: the endometrium will be shed during menstruation, and the residual tissue will be peeled off from the uterine wall, leaving the blood sinuses in an open state, thus causing heavy menstrual flow. The first time after the abortion menstruation is particularly heavy, it is recommended to go to the hospital in time, more need to carry out ultrasound examination of the uterine attachment, and then the doctor’s interview combined with the relevant examination, to clarify the cause of the disease after targeted treatment.