The cost of a vaginal ultrasound varies depending on the hospital and is usually around$120. Vaginal ultrasound is actually done to observe the pelvic cavity more clearly. First of all, there is a vaginal probe with a condom inserted into the vagina to observe the uterine contour and see if the uterus is within the normal size range, then the left ovary and the right ovary can be scanned to find out if there is anything growing on the ovaries or if there are any cysts. The most advantage of vaginal ultrasound over abdominal ultrasound is that there is no need to hold urine, which saves patients a lot of time.