Blocked Tubes & Hydrosalpinx: Impact on Pregnancy

In a healthy reproductive system, the fallopian tube acts as the meeting point for the egg and sperm. When these tubes are blocked or damaged—a condition known as Tubal Factor Infertility—natural conception becomes nearly impossible. One of the most common forms of this blockage is Hydrosalpinx.

What is Hydrosalpinx?

Hydrosalpinx occurs when the fallopian tube becomes blocked at its end (near the ovary) and fills with fluid. On an ultrasound, we look for three distinct types:

• Hydrosalpinx Simplex: The tube is stretched thin with few internal folds.
• Hydrosalpinx Follicularis: The tube lumen is broken into small compartments.
• Sactosalpinx: A tube stuffed with retained inflammatory secretions.

Common Causes of Blockage

Most tubal blockages are the result of previous inflammation or infection, including:

How Do We Test for Blocked Tubes?

If we suspect tubal issues, we use several diagnostic tools:

• HSG (Hysterosalpingogram): An X-ray procedure using a special dye to check the shape of the uterus and the patency (openness) of the tubes.
• Ultrasound/MRI: Useful for identifying visible fluid collections like a large hydrosalpinx.
• Laparoscopy: The “gold standard” where a camera is used to directly visualize the tubes and test them with dye (chromopertubation).

Why Hydrosalpinx Matters for IVF

Many patients wonder why they need to treat their tubes if they are going for IVF. Research shows that hydrosalpinx reduces IVF success rates by 50%. The fluid inside the blocked tube can flow back into the uterus, acting as a toxin to the embryo and preventing implantation. Furthermore, the risk of spontaneous abortion is doubled in the presence of an untreated hydrosalpinx.