Four abortions are more damaging to most women, and the possible adverse consequences are mainly in the following aspects: first, abnormal menstruation, mainly manifested as low menstrual flow or amenorrhea, cyclic lowering of the abdomen, but no obvious menstrual flow, which is mainly related to endometrial damage, cervical canal adhesion or endometrial adhesion. Secondly, secondary infertility, habitual miscarriage, or special circumstances such as embryonic arrest, premature rupture of membranes, and midterm preterm delivery can occur after pregnancy. This is mainly due to endometrial damage, endometrial adhesions and formation of adhesion bands, which affect the soil and space for embryo growth and development. Thirdly, endometriosis, or inflammation of the endometrium or muscle layer may occur, and cause dysmenorrhea or painful intercourse, usually accompanied by abdominal pain and other discomfort. Some women have a better constitution and do surgical or medication abortion, which does not cause much damage to the uterus. After the operation, they are repaired with drugs in time, and there is no obvious abnormality in their body after four abortions.