Saline Sonohysterogram (SHG)

What Is A Saline Sonohysterogram (SHG)?


An Saline Sonohysterogram (SHG) is a diagnostic ultrasound used to detect any abnormal structures on the inside of your uterus (uterine cavity). It can give some insight into blockages of your fallopian tubes. This procedure can also be known as SIS (saline infusion sonography).


Our ultrasonographer performs the SHG vaginally by injecting a small amount of sterile saline solution through the cervix into your uterine cavity with a catheter. Your cavity then expands so abnormal structures that may interfere with pregnancy or cause irregular bleeding, such as fibroids or polyps, may be visualized. A spill of the saline solution may also be seen from your fallopian tubes. Thus confirming they are open and unobstructed.
This test is generally done in the first half of your menstrual cycle after bleeding has stopped and before ovulation has occurred. It can also take place at any other time while on birth control pills or as advised by your doctor.

Preparation Instructions

If antibiotics are prescribed, please follow the instructions for these as given by your nurse, and take all of the pills prescribed. This test is not usually painful but can cause mild cramping and spotting during and after the procedure. You may take 2-4 ibuprofen (400-800mg) 30-60 minutes before the procedure to help alleviate this discomfort. Contact us if you are experiencing pain, very heavy bleeding, abnormal vaginal discharge, and/or a fever.


A normal result is when the uterine cavity and fallopian tubes are free from obstructions. If the doctor is unable to clearly see the fallopian tubes a hysterosalpingogram (HSG) may be ordered to detect any blockages.

Learn more about all baseline testing done when evaluating one’s fertility health.