Hysteroscopy is more sensitive and has a higher negative predictive value than saline infusion sonohysterography (SIS) in detecting intracavitary abnormalities, according to a study comparing the two techniques. The study of 80 women found hysteroscopy had a sensitivity of 96.3% versus 89.3% for SIS. Hysteroscopy also had a higher negative predictive value of 92.3% compared to 76.9% for SIS. However, SIS has advantages of being non-invasive, cheaper, faster, and less discomfortable for patients. Both techniques had few complications, with bleeding being most common for SIS. The study concludes hysteroscopy is superior for diagnosis but S