Hysterosonography or saline infusion sonography (SIS) is a non-surgical diagnostic technique for the assessment of the uterus and endometrial cavity. It consists of a sterile saline infusion into the uterine cavity via a thin catheter, with subsequent transvaginal ultrasonography. Saline improves visualization of the uterine lining and walls, facilitating the identification of uterine... https://healthcheckbox.com/gynecology/hysterosonography/