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What is HyCoSy?

HyCoSy is an investigation of the fallopian tubes.   It is not possible to see the fallopian tubes with normal x-rays or ultrasound. This test involves the use of a dye (contrast agent) specially designed for use with this type of test. The dye is safe and will not affect future fertility or have any effect on the fallopian tubes; it is used so that we can see the fallopian tubes much better on the ultrasound scan.

The HyCoSy test is performed by a sonographer with specialist skills in carrying out this type of procedure.

You will have been sent for this test if you are having difficulty getting pregnant. The fallopian tubes carry the egg from the ovaries to the uterus. If the tubes are damaged or blocked it may be difficult to become pregnant. Your doctor will need this information about your fallopian tubes to understand whether the tubes may be blocked or damaged. This test result can help the doctor to plan any future care you may need.

What to expect at your appointment

The scan will take approximately half an hour. Prior to the scan commencing you will be asked to empty your bladder and will then be shown into the examination room. You will be made comfortable on the examination couch and a transvaginal (internal) ultrasound will be carried out.

A speculum is then placed into the vagina (like a cervical smear examination) and a catheter (tube) is inserted into the uterus. Dye is then injected down the catheter and if the fallopian tubes are open, the dye will be seen within the tubes on the ultrasound scan. Not seeing dye in the tubes does not always mean the tubes are blocked but this information is useful for your consultant to help in planning your care and future treatment.

Whilst this scan is unlikely to be painful, some ladies may experience ‘period type’ pains during and shortly after the scan. You are therefore advised to take an anti-inflammatory pain relief such as Ibuprofen or Neurofen half an hour before the examination. If you are unable to take an anti-inflammatory pain relief, Paracetamol may be taken instead.