Blocked Fallopian Tubes: What It Means and What Your Options Are

Being told your fallopian tubes might be blocked is one of the more frightening things a doctor can say when you are trying to conceive. It sounds definitive. Permanent. Like a door closing.

In most cases, it is neither of those things. Blocked fallopian tubes are one of the more common and more treatable causes of female infertility — but they require proper investigation before anyone can tell you what your specific situation looks like. This article explains what you need to know.

What Do the Fallopian Tubes Actually Do?

The fallopian tubes are two narrow tubes that connect the ovaries to the uterus. After ovulation, an egg travels through a fallopian tube toward the uterus. If sperm are present and fertilisation occurs, it happens inside the tube. The fertilised embryo then continues down into the uterus, where it implants.

When a tube is blocked, this journey cannot complete. The egg cannot reach the sperm, or the embryo cannot reach the uterus. Depending on which tube is affected and how complete the blockage is, the impact on fertility varies significantly.

What Causes Blocked Fallopian Tubes?

Most tubal blockages result from one of the following:

Past Pelvic Infections

Pelvic Inflammatory Disease (PID) — often caused by untreated sexually transmitted infections like chlamydia or gonorrhoea — is one of the most common causes. The infection causes inflammation, and the healing process leaves scar tissue that can partially or fully block the tube. Crucially, PID often has no obvious symptoms, so many women are unaware they ever had it.

Endometriosis

When endometrial tissue grows outside the uterus and attaches to the fallopian tubes, it can cause blockage or structural damage. Women with endometriosis have a higher rate of tubal involvement.

Previous Ectopic Pregnancy

An ectopic pregnancy occurs when a fertilised egg implants in the fallopian tube rather than the uterus. Treatment often involves removing or damaging the affected tube, which may leave it partially or fully blocked.

Fibroids or Polyps

Uterine fibroids or polyps can occasionally grow in a position that compresses or blocks the entry of the fallopian tube.

Previous Pelvic or Abdominal Surgery

Any surgical procedure in the pelvic area — including appendectomy or C-section — can occasionally result in adhesions (scar tissue bands) that affect the tubes.

How Are Blocked Tubes Diagnosed?

The standard test for blocked fallopian tubes treatment is a Hysterosalpingography (HSG). This is an X-ray procedure where a contrast dye is injected through the cervix into the uterus. The dye flows through the uterine cavity and into the fallopian tubes. If it spills out freely at the end of the tube, the tube is open. If the dye stops, the tube is blocked.

The procedure takes about 15–20 minutes and is done in a clinic or radiology centre, usually on days 7–10 of the menstrual cycle. It can cause mild to moderate cramping, similar to a difficult period. Most women find it manageable.

The HSG also provides useful information about the uterine cavity — its shape, any structural abnormalities, and the position of any fibroids or polyps.

A laparoscopy (keyhole surgery) can also diagnose and sometimes treat tubal blockages in the same procedure — but it is more invasive and is generally reserved for cases where the HSG results are unclear or where other pelvic conditions need investigation.

What Do Your Options Look Like?

One Tube Open, One Blocked

This is a common finding. If one tube is healthy and open, many women can still conceive naturally — the remaining tube can pick up eggs from either ovary. Studies suggest that women with one healthy tube have approximately 70–80% of the natural conception rate of women with two open tubes.

In this situation, many specialists will recommend continuing to try naturally for a reasonable period before considering intervention, depending on your age and other factors.

Both Tubes Blocked

If both tubes are blocked, natural conception is not possible through the tubes. This is one of the situations where IVF is not a "last resort" — it is the most direct and logical route. IVF bypasses the fallopian tubes entirely: eggs are retrieved from the ovaries directly, fertilised in a lab, and the resulting embryo is transferred directly into the uterus. The tubes play no role in this process.

Partial Blockages

Some blockages are partial — the tube is narrowed rather than fully occluded. In some cases, a procedure called tubal cannulation can clear the blockage using a thin wire guided through the HSG catheter. This works best for blockages at the junction where the tube meets the uterus (called a proximal blockage).

Blockages in the middle or distal section of the tube are less responsive to this approach, and surgery to repair them carries a risk of re-scarring.

A Note on Hydrosalpinx

A hydrosalpinx is a specific type of blocked tube where fluid accumulates inside the blocked tube, causing it to swell. This fluid can be toxic to embryos and is known to reduce IVF success rates. If a hydrosalpinx is found before an IVF cycle, most specialists will recommend removing or clipping the affected tube before proceeding — this meaningfully improves outcomes.

Getting the Right Information First

If you suspect tubal issues — particularly if you have a history of pelvic infections, endometriosis, or an ectopic pregnancy — getting the right investigation is the most important first step.

A free fertility assessment can help you understand what investigation makes sense for your specific situation before you book appointments or make decisions.

Blocked tubes are not the end of the road. For most women, they are a specific, diagnosable problem with a specific, manageable path forward.