Understanding Uterine Ultrasound (Sonohysterography)
Uterine ultrasound (sonohysterography) is also known as saline infusion sonography. It is a test that uses sound waves and a computer to make pictures of the inside of the uterus. It's safe and fairly painless. It does not use radiation. During the procedure, the health care provider injects a small amount of sterile saline into the uterus. The saline improves the details of the images produced by ultrasound waves. The uterus is the organ where a baby grows during pregnancy.
Why uterine ultrasound is done
The procedure is used to help diagnose problems with the uterus such as:
You may have this procedure if you have symptoms such as:
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Heavy periods.
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Bleeding between periods.
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Bleeding in menopause.
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Trouble getting pregnant (infertility).
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Pregnancy loss or repeated miscarriage.
This test may also be done before or after some types of surgery. If you have had other tests, your health care provider may use this test to get more information.
How uterine ultrasound is done
You’ll lie on your back on an exam table. You’ll bend your knees and place your feet in stirrups at the end of the exam table. Your health care provider may first give you a pelvic exam to check for any pain. Next, you’ll have a transvaginal ultrasound. A slim wand called an ultrasound transducer will be used for your exam. A special type of ultrasound called Doppler may be done. This ultrasound shows how blood is flowing through the blood vessels in the uterus.
For the uterine ultrasound, the provider will put a device (speculum) into your vagina. The speculum opens (dilates) the vagina. A thin tube (catheter) is then placed into the opening of your uterus (cervix). You may feel some pinching or cramping. The ultrasound transducer is placed into your vagina. A sterile liquid (saline solution) is sent through the catheter into the uterus. The liquid helps give more detailed images of the inside of the uterus. Images are sent to the computer screen.
A transabdominal ultrasound may also be done at this time. This exam uses a transducer over the belly (abdomen).
Risks of uterine ultrasound
Most procedures have some risks. This procedure has few risks. You may feel discomfort during the procedure. You may have vaginal spotting for a few days after the procedure. There is a very small risk of infection. Your health care provider will take steps to help prevent infection.
Some people should not have this test, including those who:
If you think you might be pregnant, tell your provider. Talk with your provider about which risks apply to you.
Online Medical Reviewer:
Daphne Pierce-Smith RN MSN
Online Medical Reviewer:
Tennille Dozier RN BSN RDMS
Online Medical Reviewer:
Vinita Wadhawan Researcher
Date Last Reviewed:
3/1/2025
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