If the following manifestations occur after having an abortion, it may lead to infertility: 1. Change in the amount of menstruation. If the menstrual volume decreases after an abortion and is more than 1/3 less than the previous menstrual volume. This situation is likely to be caused by incomplete adhesions in the uterine cavity, which will reduce the menstrual flow and it is recommended to have a hysteroscopy as soon as possible. If there are adhesions, separate them as soon as possible so that the local fibrosis will not become more serious over time and make separation difficult. 2. Lower abdominal pain occurs. If the inflammation of the pelvic cavity is caused after miscarriage, there will be repeated lower abdominal pain, and this pain will often be aggravated during menstruation, sex or after exertion. Inflammation of the pelvic cavity is likely to lead to adhesions of the fallopian tubes, so it can also lead to infertility in clinical practice.