The most common type of fistula in these systems is a vesicovaginal fistula, in which the woman's vagina is connected to the urinary bladder. This causes leakage of urine from the vagina and results in frequent vaginal and bladder infections. Fistulas may also develop between the vagina and the large intestine (an enterovaginal fistula) or rectum (rectovaginal fistula) so that feces leak from the vagina.