Saline Infusion Sonography (SIS) is a special type of sonogram or ultrasound of the uterus that provides a more in-depth evaluation of the uterine cavity.

During this minimally invasive procedure, a sterile saline solution is injected through the cervix, via a catheter, in order to capture images of the uterus.  The pairing of ultrasound technology with fluid produces a more detailed image than does a sonogram by itself.  The appointment will take about 30 minutes.

Sonohysterography is used to determine the underlying causes of abnormal vaginal bleeding.

Although SIS does not cause exposure to radiation, the procedure should be not be performed on pregnant women, or women suspected of being pregnant. It is also contraindicated for females with active pelvic infections.

SIS should be performed during days 4-9 of your cycle for optimal results. Light bleeding will not interfere with the test.

SIS may cause temporary pain or discomfort in some patients. A slightly bloody discharge may also be noticed following the procedure. This is normal and usually goes away within 24 hours.  During that time you may wear a sanitary napkin, but refrain from using tampons on the same day of your SIS.