Polycystic ultrasound can be done either vaginally or abdominally, the test site is the ovary, but the test path is different and the conditions are different. Abdominal ultrasound is performed through the abdomen, while vaginal ultrasound is performed through the vagina. Abdominal ultrasound examination of the ovaries usually need patients to hold urine to fill the bladder, in order to better see the ovaries, such as poor bladder filling, or abdominal fat hypertrophy, may affect the results of the examination; while vaginal ultrasound does not need to hold urine, is not subject to the influence of abdominal fat, but there is an acute inflammation of the vagina, vaginal bleeding, or no history of sexual intercourse in the women generally can not be vaginal ultrasound. Patients who need ultrasound for polycystic disease are advised to seek regular medical attention and decide which ultrasound to perform based on their own situation after evaluation by a doctor.