What is HyCoSy?


Hysterosalpingo-contrast-sonography (usually called HyCoSy) is a straightforward procedure which is used to assess the patency of the fallopian tubes using ultrasound to test for common symptoms such as blocked fallopian tubes. HyCoSy can also be used to check for abnormalities of the uterus and ovaries.

HyCosy is a much safer alternative to older methods as it does not use X-rays or any kind of radiation. Instead, a contrast agent is passed into the uterus via a fine catheter, and the doctor tracks this agent using ultrasound.

Woman and doctor talking about the womb

Who is HyCosy suitable for?

The HyCoSy procedure is generally recommended for women with unexplained infertility. Blockage of the fallopian tubes is a common cause of infertility, and is why HyCosy is one of the most commonly requested investigations into unexplained infertility.

There are a number of conditions which may increase the risk of occlusions in the fallopian tubes, including endometriosis, pelvic infection and appendicitis. Women who wish to undergo inter-uterine insemination (IUI) are also advised to undergo a HyCosy before going through the IUI, to make sure that the sperm will be able to meet the egg.

What does the HyCoSy test involve?

The HyCoSy procedure takes approximately half an hour. You will have an internal scan first; the doctor will take measurements of the uterus (womb), endometrium (lining of womb) and ovaries.

Under ultrasound guidance a thin tube will be passed into the womb through the neck of the womb and a small amount (5-10 mls) of fluid (normal saline) is injected into the womb to observe the presence of any abnormalities (polyp, fibroids etc) in the lining of the womb. A sulphur based medium called Sonoview is then passed into the womb and the fallopian tubes to assess the tubes.

Is a HyCoSy test painful?


The levels of pain for the HyCosy test varies from patient to patient but it is likely that you will feel some discomfort during the procedure similar to that of a period pain.

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From one of our fertility experts