Two ultrasound uterine size is different, the specific reasons are as follows: 1, transabdominal ultrasound, if the bladder is overfilled, the uterus size measurement will be slightly smaller. If the filling is not good, the uterine border is not clear, the measurement will be relatively error; 2, transvaginal ultrasound to urinate, the uterus is not squeezed by the bladder, the measurement of the uterus is relatively accurate in all diameters; 3, the measurement of uterine size, you must play the standard section of the measurement of the uterine size is relatively accurate, causing errors and the doctor’s measurements have a relationship with the doctor and may also be related to the menstrual cycle. If there is a big difference between the two ultrasound measurements of the uterus size, it is necessary to go to the hospital for further examination to determine whether there is an abnormal development of the uterus, uterine fibroids and adenomyosis.