When comparing abdominal ultrasound with negative ultrasound for gynecological examination, abdominal ultrasound cannot be compared with negative ultrasound in terms of diagnostic compliance rate and convenience of examination methods, and they still have certain differences. Although both are suitable for gynecological disease examination, abdominal ultrasound requires the patient to hold urine to fill the bladder and establish a transmissive window before scanning the small abdominal area, which can be affected by subcutaneous fat and gas in the intestinal canal as well as the blind area of the examination, resulting in some organs not being displayed clearly, thus affecting the normal diagnosis. It is easier than the abdominal ultrasound because there is no need to hold urine, but the cathodic probe is placed directly into the uterine cavity, which can display the uterus and its adnexa very clearly and therefore has a high diagnostic compliance rate, which is incomparable to the abdominal ultrasound.