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Ultrasound images from a sonohysterogram can help find the cause of bleeding or problems with getting pregnant.
Unlike a hysterosalpingogram, a sonohysterogram doesn't use X-rays or an iodine dye. The test can be done in a doctor's office, a hospital, or a clinic.
Why It Is Done
It's usually done because a normal ultrasound has not found the cause of heavy bleeding, repeated miscarriages, or trouble getting pregnant.
This imaging test checks the inside of the uterus for such things as:
- An abnormal shape or structure.
- Abnormal growths or masses, such as fibroids or polyps.
- Scarring inside the uterus (adhesions).
A sonohysterogram may be more accurate than a hysterosalpingogram for finding fibroids and polyps.
How To Prepare
You may want to bring a sanitary pad. Some of the saline solution may leak out after the test. You also may have some slight bleeding.
Your doctor may schedule the test for soon after your period ends.
How It Is Done
A sonohysterogram can be done in a doctor's office, a hospital, or a clinic.
Your doctor may advise you to take an over-the-counter pain medicine before your appointment. This may help prevent cramping pain during the test.
Before the test, you empty your bladder. You then take off your clothes below the waist. You are given a gown or sheet to cover up with during the test.
For the test, you sit on the edge of a padded table. Then you lie back with your feet raised and supported by stirrups.
A sonohysterogram is done in several steps.
- Transvaginal ultrasound. The tip of a thin ultrasound wand with gel on it is gently inserted into your vagina. You will need to lie very still while the ultrasound is being done.
- A catheter is put in place. Next, your doctor inserts a smooth, curved tool called a speculum into your vagina. The speculum gently presses the vaginal walls outward, allowing your doctor to see the cervix. The cervix is washed. Then a flexible tube (catheter) is put in the cervix or through the cervix into the uterus.
- Transvaginal ultrasound while the uterus is filled with fluid. The doctor then removes the speculum and reinserts the ultrasound wand. Onscreen, the ultrasound image shows the inside of your uterus while saline solution is injected through the tube into the uterus. Ultrasound images are taken and reviewed.
After the test, the ultrasound wand and then the tube are removed. Some of the saline solution flows through the fallopian tubes into your abdominal cavity. But most runs out of your cervix and vagina.
How long the test takes
The test will take about 15 to 30 minutes.
How It Feels
You may feel some discomfort as the transducer is put into your vagina. You probably will feel some cramping (like menstrual cramps) from the fluid being injected into your uterus.
There is a small chance of pelvic infection after a sonohysterogram.
The shape of the uterus is normal.
No objects (such as an intrauterine device, or IUD), tumors, or growths are seen in the uterus.
The uterus may have an abnormal shape or structure.
The uterus may show tissue (called a septum) that divides the uterus.
Current as of: October 8, 2020
Author: Healthwise Staff
Kathleen Romito MD - Family Medicine
Adam Husney MD - Family Medicine
Kirtly Jones MD - Obstetrics and Gynecology
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