Endometritis can be divided into tuberculous endometritis and non-tuberculous endometritis, with the latter being more common in clinical settings. Non-tuberculous endometritis is often caused by various pathogenic infections. It commonly occurs during menstruation, after a miscarriage, or during childbirth due to bacterial infections. For instance, inadequate sterilization during surgery, sexual activity during menstruation, and the retention of placenta or membranes after childbirth can all facilitate ascending infections.