Blocked fallopian tubes: How They Are Investigated

A fallopian tube investigation asks whether fluid can pass through the tubes. You may hear this called a patency test. It can help explain a fertility difficulty, but symptoms alone cannot reliably show whether a tube is blocked, and one result may need further interpretation.

Explain the history before choosing a test

Tell the clinician about previous pelvic infection, an ectopic pregnancy, endometriosis or surgery. These details can change which investigation is appropriate. Bring any earlier reports so the team can see what was examined rather than relying on the word “blocked” from memory.

Tube testing is usually considered with other parts of a fertility assessment. If endometriosis is relevant, the endometriosis and conception guide explains why the broader plan matters.

Understand the main investigations

A hysterosalpingogram, or HSG, uses X ray images and contrast introduced through the cervix to outline the womb and assess passage through the tubes. A contrast ultrasound test, often called HyCoSy, uses ultrasound to assess that passage instead.

These are different from simply having a routine pelvic ultrasound. Ask which test you are being offered and what information it is expected to provide. The choice depends on your history, local expertise and whether other pelvic problems need investigation.

Laparoscopy with dye is another way to assess the tubes, but surgery is not routinely needed solely to check whether they are open. It may be considered when there is another reason to examine the pelvis. The laparoscopy guide explains the distinction between an outpatient scan and an operation.

Prepare with the clinic’s instructions

An HSG should not take place during pregnancy. Ask about cycle timing, avoiding pregnancy before the appointment, infection screening and any pregnancy test the service requires. Tell the team about allergies or previous contrast reactions.

Ask about pain relief in advance. Cramping and some spotting can occur. Before leaving, obtain the service’s aftercare advice and contact details. Fever, worsening or severe pelvic pain, unusual offensive discharge or heavy bleeding after the procedure need prompt medical assessment.

Ask what the result establishes

An apparent blockage near the womb can sometimes reflect temporary spasm or a technical issue. This is particularly relevant when both tubes appear blocked at that end. The clinician may recommend further evaluation before treating that result as confirmed permanent obstruction.

Ask whether the finding concerns one tube or both, where it is located and whether there is evidence of other damage. A report that fluid passed through a tube does not guarantee pregnancy, while an abnormal report does not by itself choose the treatment. Request a results discussion that connects the images with your history and explains the next investigation or fertility options.