The hazards of having an abortion when pregnant are very numerous and have a profound impact on the patient, not only on the patient’s health, but also on the patient’s ability to have children again. The hazards are mainly reflected in the following two major aspects: first, the hazards of doing the surgery. During the surgery, there is a risk of upstream infection, leading to inflammatory diseases of the pelvis or blockage of the fallopian tubes. In addition, there is a risk of hemorrhage, uterine perforation, excessive damage to the endometrium, etc. during the surgery. Secondly, there are secondary risks after surgery, such as low menstrual flow or even amenorrhea due to endometrial damage or adhesions; secondary infertility or habitual miscarriage due to surgical damage. Even if the patient becomes pregnant again, the possibility of placental adhesions or implantation is very high.