If you are reading this article, you might be one of the many women in Singapore who are struggling with getting pregnant. In fact, approximately 1 in 7 couples in Singapore experience fertility issues. Among the various causes of female infertility, blocked fallopian tubes account for about 30-40% of cases, making it one of the most common reasons women struggle to conceive naturally. We will walk you through everything you need to know about blocked fallopian tubes, from understanding what they are to exploring your treatment options right here in Singapore.

What to Know About Your Fallopian Tubes

Think of these body organs as highways that connect your ovaries to your uterus. They play a very important role in natural conception, each about 11 to 12 centimetres long but less than 1 millimetre wide inside. If one doesn’t have healthy, open fallopian tubes, it would be significantly more challenging for that person to conceive.

How do they work?

Every month during ovulation, one of your ovaries releases an egg. The fallopian tube on that side has finger-like projections called fimbrae that gently sweep the egg into the tube. This is where the magic happens. If sperm are present, fertilisation usually occurs in the wider part of the tube called the ampulla. Once fertilisation happens, tiny hair-like structures called cilia, along with gentle muscle contractions in the tube walls, work together to transport the developing embryo toward your uterus over the course of several days. The embryo then implants in the uterine lining, establishing pregnancy. When one or both tubes become blocked or damaged, this process is disrupted. Sperm may not be able to reach the egg, or a fertilised embryo might not make it to the uterus. In some cases, a partially blocked tube can lead to an ectopic pregnancy, where the embryo implants in the tube itself, a dangerous condition requiring immediate medical attention.

Recognise the Symptoms of a Blocked Fallopian Tube

Here is what makes blocked fallopian tubes challenging. Most women have absolutely no idea anything is wrong until they try to conceive. Unlike many other health conditions that announce themselves with obvious symptoms, tubal blockages typically remain silent for years.

When Symptoms of Blocked Fallopian Tubes Occur

Though most women experience no symptoms at all, some may notice the following:

1. Mild pelvic pain that comes and goes with your menstrual cycle
2. One-sided lower abdominal discomfort, especially if you have a hydrosalpinx (fluid-filled blocked tube)
3. Pain during intercourse in some cases
4. Unusual vaginal discharge if an infection is present

However, the most common “symptom” is simply the inability to get pregnant after 12 months of trying (or six months if you’re over 35).

Red Flags in Your Medical History

Certain experiences in your past might increase your risk of having blocked tubes.

1. Previous sexually transmitted infections (STIs), especially chlamydia or gonorrhoea, even if they were treated
2. Pelvic inflammatory disease (PID) diagnosis
3. Endometriosis diagnosis or symptoms
4. Previous abdominal or pelvic surgery, including C-sections, appendectomy, or ovarian cyst removal
5. History of ectopic pregnancy
6. Past absorption or miscarriage with complications
7. Burst appendix in the past

If any of these apply to you and you’re planning to conceive, it’s worth discussing with your doctor sooner rather than later.

Causes of Blocked Fallopian Tubes

Understanding what causes tubal blockages can help you make sense of your diagnosis and, in some cases, take preventive measures for the future.

Pelvic Inflammatory Disease

The most common cause of blocked fallopian tubes is pelvic inflammatory disease (PID), usually resulting from untreated STIs. Bacteria from STIs like chlamydia or gonorrhoea travel upward from the vagina through the cervix, eventually reaching the fallopian tubes. The infection triggers inflammation, and as your body fights the infection, scar tissue forms. This scarring can partially or completely block the tubes, and the damage is often permanent. What’s alarming is that many women never knew they had an STI.

Endometriosis

Endometriosis happens when tissue similar to your uterine lining grows outside your uterus. When this tissue attaches to or near the fallopian tubes, it can cause inflammation, scarring, and adhesions (bands of scar tissue that can bind organs together. These adhesions can distort the tubes’ shape, block them, or prevent them from moving freely to capture eggs.

Surgical Scarring and Adhesions

Any surgery in your pelvic or abdominal area can potentially lead to adhesions that affect your fallopian tubes. Common procedures that may cause this include:

• Caesarean sections
• Ovarian cyst removal
• Fibroid removal
• Appendectomy
• Previous ectopic pregnancy surgery

The body’s healing process sometimes creates excess scar tissue that can block or damage the tubes.

Hydrosalpinx

A hydrosalpinx occurs when the end of a fallopian tube becomes blocked and fills with fluid. This creates a swollen, sausage-shaped tube that reduces IVF success rates by up to 50% if left untreated. The fluid can leak back into the uterus, creating a toxic environment for embryo implantation.

Getting Diagnosed in Singapore

If you have been trying for a long time to conceive but without success, your doctor will likely recommend testing to check if your fallopian tubes are open and healthy. In Singapore, you have access to several diagnostic options at both public and private facilities.

When should you seek testing?

The general guidelines are:

• If you are under 35, after 12 months of regular, unprotected intercourse without conception
• If you are 35 or older, after 6 months of trying
• If you have risk factors, consider testing before trying or after just a few months

The Hysterosalpingogram (HSG)

The HSG is usually the first test recommended to check tubal patency (whether the tubes are open). The procedure: You will be scheduled during the first half of your menstrual cycle, after your period ends but before ovulation. During the test, a thin catheter is inserted through your vagina and cervix into your uterus. A special dye is then injected while X-rays are taken. The entire procedure usually takes about 15-30 minutes. What you will feel: Many women experience mild to moderate cramping similar to period pain during the procedure. Some facilities offer pain relief options, so don’t hesitate to ask. Reading the results: If the dye flows through your tubes and spills into your abdominal cavity, your tubes are “open.” If the dye stops at a certain point, this indicates a blockage. Important limitation: An HSG can tell you if a tube is open, but it can’t assess the health of the delicate cilia inside the tubes. A tube might be open but still non-functional if the internal lining is severely damaged.

Alternative: Hysterosalpingo-contrast Sonography (HyCoSy)

HyCoSy is an ultrasound-based alternative to HSG. Instead of X-rays and iodine dye, it uses ultrasound and a foam or saline solution. Some women find this more comfortable, and it avoids radiation exposure. The accuracy is comparable to HSG.

The Gold Standard: Laparoscopy

For the most comprehensive diagnosis, your doctor might recommend a laparoscopy. This minimally invasive surgery involves making small incisions in your abdomen to insert a camera to have a direct visualisation of your reproductive organs. Advantages

• Provides the clearest view of your tubes, ovaries and uterus
• Can diagnose endometriosis, adhesions, and other pelvic conditions
• Allows for immediate treatment of some problems found during the procedure
• Can perform chromopertubation (injecting dye directly to test tube patency)

This is typically done as a day surgery under general anaesthesia. Recovery usually takes a couple of days to a week.

Treatment for Blocked Fallopian Tubes

Once you have a diagnosis, you will need to decide on a treatment path. In Singapore, you have access to world-class fertility treatments at both public and private centres. The right choice depends on factors like your age, the severity and location of blockages, and your personal preferences.

Fallopian Tube Recanalisation (FTR)

If you have a proximal blockage (near the uterus), FTR might be an excellent option. Using X-ray guidance, a thin catheter is threaded through your cervix and uterus into the blocked tube. A guide wire then clears the blockage, often caused by mucus plugs or minor scarring. The procedure is done as an outpatient service with light sedation. You’ll typically stay for four to six hours and can return to normal activities within a day or two.

Laparoscopic Surgery

Laparoscopic surgery might help with the following:

1. Adhesion removal → cutting away scar tissue that’s blocking or distorting tubes
2. Fimbrioplasty → repairing the finger-like ends of the tubes
3. Salpingostomy → creating a new opening in a blocked tube
4. Salpingectomy → removing severely damaged tubes before IVF

Tubal Ligation Reversal

If your tubes were previously tied for permanent contraception, reversal surgery might be possible. Success depends on:

1. Your age (best if under 35)
2. How the tubes were originally blocked
3. The length of the healthy tube remaining
4. Your ovarian reserve

IVF

In vitro fertilisation has revolutionised treatment by completely bypassing the need for functioning fallopian tubes. It is recommended for the following conditions:

1. Bilateral blockage
2. Severe tubal damage
3. Presence of hydrosalpinx
4. Women over 35
5. Failed surgical repair
6. Male factor infertility

Making the Choice

This decision is highly personal and should be made with your fertility specialist. Here is a comparison to help guide your thinking.

Consider surgery if…	Consider IVF if…
You are under 35 with good ovarian reserve You have a proximal blockage or minimal damage You hope to conceive multiple children naturally You prefer to avoid fertility medications You have time to wait for natural conception	Aside from the recommendations above, choose this if… You want the highest per-attempt success rate You are comfortable with medical intervention Other fertility factors are present

Questions to Ask Your Doctor

Come prepared with questions:

1. What’s the specific location and severity of my blockage?
2. What are my chances of success with each treatment option?
3. What’s my risk of ectopic pregnancy?
4. How many cycles or attempts do you recommend?
5. What’s the total estimated cost after subsidies?
6. What’s the typical timeline for my treatment plan?
7. Are there any lifestyle changes that could improve my chances?

Finding Hope

A diagnosis of blocked fallopian tubes can feel devastating, especially if you have been dreaming of starting a family. It’s normal to grieve the loss of easy conception and to feel anxious about the journey ahead. But here is what you should remember, blocked fallopian tubes are one of the most treatable causes of infertility. You have access to world-class fertility care here in Singapore. Your journey might look different from what you imagined but it can still lead to the family you’re hoping for. Talk to a gynaecology clinic in Singapore now to further shed light on this condition.