HSG fertility test: how are the fallopian tubes checked?
Learn what an HSG fertility test can show about the uterus and tubes, how the examination works and why an apparent blockage sometimes needs confirmation.
An HSG fertility test, or hysterosalpingogram, uses contrast and X-ray imaging to assess the shape of the uterine cavity and whether the fallopian tubes appear open. The tubes are important for sperm and egg to meet, so obstruction can make unassisted fertilisation more difficult.
HSG is not automatically needed by every fertility patient. A clinician selects it in the context of pregnancy history and risks such as previous pelvic infection, ectopic pregnancy, endometriosis or surgery. The result can guide care, but every apparent blockage on an image is not a final diagnosis.
What happens during an HSG?
The procedure is usually scheduled on an appropriate day after menstruation when pregnancy is not possible. Contrast is introduced through a thin catheter at the cervix, and X-ray images follow it through the uterus and tubes and, when open, into the pelvic cavity. The team provides individual preparation and pain-relief instructions.
Short-lived cramping similar to period pain can occur. Severe or increasing pain, fever, offensive discharge or heavy bleeding should be reported using the urgent contact instructions provided by the clinic.
- Timing is selected in relation to the menstrual cycle.
- Contrast passage provides information about the cavity and both tubes.
- Preparation and aftercare instructions should come from the treating clinic.
What can the result show?
Free passage of contrast supports the appearance of patent tubes. HSG may show proximal or distal occlusion, aspects of tubal architecture and possible abnormalities within the uterine cavity. Additional ultrasound or hysteroscopy may be needed to characterize a suspected polyp or small submucosal fibroid.
When both tubes appear blocked close to the uterus, temporary muscle spasm or catheter position can sometimes create an artefact. The clinician may suggest repeat HSG, selective cannulation or another method before confirming the finding.
Alternative tests and the next decision
Contrast ultrasound techniques can also assess tubal patency, with accuracy partly dependent on operator experience. Laparoscopy is not a routine first-line procedure solely for checking tubes, although patency can be assessed if surgery is already indicated for another reason.
The next step depends on age, blockage location, hydrosalpinx, other fertility factors and personal priorities. A result does not automatically dictate tubal surgery or IVF; likely benefit, risk and time should be considered together.
Frequently asked questions
Does blockage on HSG always mean the tube is closed?
No. A finding near the uterus can sometimes be caused by spasm or a technical factor. The clinician reviews the images and decides whether confirmation is appropriate.
Is an HSG painful?
Experiences differ. Some people have brief mild or moderate cramping. Ask the clinic in advance about preparation, pain relief and symptoms that should be reported afterward.
You can discuss whether an HSG fertility test is appropriate for you, or what an existing result means, during an individualized consultation with the Övlad Payı team.
Trusted sources
This article is for patient education and does not replace individual medical advice.
