Sonohysterography, also called a saline infusion sonogram (SIS) or sonohysterogram, is a procedure to look at the inside of the uterus. It's a safe test that uses sound waves and a computer to create images. It does not use radiation.
While the ultrasonographer takes images of the uterus, sterile liquid is gently injected through the thin tube, or catheter. You may feel a little bloating or cramping, but most women don't feel much.
