The brown secretion at coitus on the 45th day of induced abortion may be caused by cervical columnar epithelial ectasia, endometritis, pelvic inflammatory disease and other conditions. 1. Cervical columnar epithelial ectasia: usually a physiological change, mainly by the body estrogen level. After induced abortion, the level of estrogen in the body is low, which will make the columnar epithelium move to the cervical canal again. Patients generally have no special symptoms, if the mouth of the cervix is stimulated or infection occurs, there may be contact bleeding, abnormal leukorrhea and other symptoms, and some patients may also be manifested as induced abortion 45 days of coitus with brown secretion. 2. Endometritis: Usually the patient in the postpartum, cesarean section or abortion, endometrial trauma, and bacteria into the trauma induced infection caused. Patients often appear lower abdominal pain, abnormal vaginal discharge and other symptoms, which can also appear induced abortion 45 days of coitus with brown discharge phenomenon. The serious condition can also be accompanied by rapid heart rate, chills, fever and so on. 3. Pelvic inflammatory disease: it is usually caused by pathogen infection, and is also related to sexual life, infection after operation in the uterine cavity, the spread of inflammation in neighboring organs, and infection of the lower reproductive tract. Patients often appear lower abdominal pain, fever, increased vaginal discharge and other symptoms, can also appear during sexual intercourse, post-coital bleeding, which can be manifested as induced abortion 45 days of coitus with brown discharge. It is recommended that induced abortion patients in about 45 days of coitus with brown discharge, timely medical treatment, clear cause and active treatment.