Talk to us 0870 039 2949
HyCosy scan diagram

What is HyCoSy?

Hysterosalpingo-contrast-sonography (HyCoSy) is a special type of scan used to assess the fallopian tubes. This is a straightforward procedure which is used to assess the patency of the fallopian tubes using advanced 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, it’s a much safer alternative to older methods as it does not use X-rays or any kind of radiation. Instead, a foam dye is used to show the inside of the structures and detect any problems.


Who is it for

  • Women who would like to test the patency of the fallopian tubes
  • Those who wish to undergo inter-uterine insemination (IUI) are also advised to undergo a HyCosy
  • Patients with endometriosis, pelvic infection or appendicitis
  • Patients with endometriosis

How does it work?

A HyCoSy scan is performed as if you were having a smear test.
A speculum is gently inserted into the vagina followed by a catheter.  This narrow plastic tube is introduced through the cervix (neck of the womb).

A tiny balloon at the end of the catheter is inflated. This keeps the catheter in position during the test. A small amount of water is passed through the catheter into the uterus. Using an internal ultrasound we can then watch as the water shows up the lining of the uterus.

A contrast fluid that is seen clearly on ultrasound is then passed through the catheter. This shows up the fallopian tubes and highlights any blockages that might be there. The fluid is easily processed and absorbed by the body after the procedure.

What is the difference between HSG and HyCoSy?

A hysterosalpingogram (HSG) is performed in a similar way to HyCoSy, using an iodine contrast liquid and X-ray. It is the traditional method used to examine the fallopian tubes. Studies have shown that HyCoSy is as reliable as the more traditional HSG in assessing tubal patency. HyCoSy does not use radiation or ionising contrast material so has a lower impact on the body.

Book an Appointment today!

Book a consultation