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Sonohysterography is a test in which saline is injected through the cervix into the uterus distending the cavity. Ultrasound is then used to image the uterine cavity. The uterine distension allows visualization of more details of the inside of the uterus than when ultrasound is used without saline distension. The procedure is done in the clinic, usually takes about 15 minutes.

Why is sonohysterography done?

Sonohysterography can determine the underlying cause of many problems, including abnormal uterine bleeding, infertility, and repeated miscarriage. A sonohysterogram may be ordered when a woman has had a normal ultrasound exam but is still having symptoms and is done routinely prior to IVF treatment. This procedure can detect the following conditions:

• Abnormal growths inside the uterus, such as fibroids or polyps

• Scarring inside the uterus

• Abnormal uterine shape. Sonohysterography also is done before and after some surgical procedures.

When is sonohysterography done?

The procedure will be scheduled when you are not having your menstrual period or if you are on the birth control pill. If you are bleeding, the results may not be as clear. The test may be postponed until the bleeding stops. The procedure is not done if you are or could be pregnant, or if you have a pelvic infection or pelvic inflammatory disease. You may be given a urine test to rule out pregnancy.

How is sonohysterography performed?

Sonohysterography has two parts. A transvaginal ultrasound exam is done first. Next, a thin tube called a catheter is inserted through the vagina through the opening of the cervix into the uterine cavity. The speculum then is removed. The transducer is placed in the vagina again. Sterile saline is slowly passed through the catheter. Cramping may occur as the saline goes into the uterus.

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