The main symptom of bacterial vaginitis is a marked increase in vaginal discharge, which is grayish-white and sticky, with a foul or fishy odor. It is recommended to follow a regular course of treatment, at least three courses of treatment, when bacterial infection is detected by routine leuko-vaginal examination. If the symptoms worsen without treatment, serious retrograde infection may occur, for example, the cervix may be infected causing cervicitis, and continued upward infection may cause endometritis, tubitis, and most seriously inflammation of the entire pelvis. If bacterial vaginitis is found, it must be treated urgently without delay. A long delayed retrograde infection can cause endometritis or adnexitis, which can affect future pregnancies and thus cause infertility and may result in frequent abdominal pain.