Most women with blocked fallopian tubes have no symptoms at all. The blockage is typically discovered during a fertility workup after months of trying to conceive without success. There is no home test or reliable set of physical signs that can tell you whether your tubes are open or closed. Diagnosis requires a medical imaging test or surgical procedure.
Why Blocked Tubes Rarely Cause Symptoms
Fallopian tubes are narrow, flexible structures, and a blockage in one or both tubes doesn’t usually produce pain or any noticeable change in your body. Your periods will likely stay regular because ovulation and menstruation are controlled by your ovaries and uterus, not your tubes. You can ovulate every month with completely blocked tubes and have no idea anything is wrong.
There is one exception. When a blocked tube fills with fluid, a condition called hydrosalpinx, it can occasionally cause pelvic pain that worsens during or right after your period, along with unusual vaginal discharge that may be discolored or sticky. But even hydrosalpinx rarely produces symptoms. According to Cleveland Clinic, most women don’t realize their tubes are blocked until a provider investigates why they’re having difficulty getting pregnant.
What Causes Tubes to Become Blocked
Pelvic inflammatory disease (PID) is the most common cause. PID is usually triggered by sexually transmitted infections like chlamydia or gonorrhea, which can travel up through the cervix and uterus into the tubes. The infection causes inflammation, and as the tissue heals, scar tissue can form inside the tube or at the delicate finger-like ends (fimbriae) that catch the egg after ovulation. The risk of tubal damage rises sharply with repeated infections. After three episodes of PID, more than 50% of women will have tubal dysfunction.
What makes this especially tricky is that these infections are often silent. A study in Fertility and Sterility found that only 37% of women who showed physical signs of prior pelvic infection actually had a history of symptomatic PID. That means nearly two-thirds never knew they’d had an infection at all.
Endometriosis is another major cause. Endometrial tissue growing outside the uterus can envelop the fallopian tubes and ovaries, causing surrounding tissues to become irritated and form scar tissue. Bands of fibrous tissue called adhesions can cause pelvic organs to stick together, and endometriosis can directly block the tube, preventing the egg and sperm from meeting. Previous abdominal or pelvic surgeries, ectopic pregnancies, and ruptured appendicitis can also lead to adhesions that affect the tubes.
The Standard Screening Test: HSG
The first test most doctors order is a hysterosalpingogram, commonly called an HSG. It’s an X-ray-based procedure done in a radiology suite or your doctor’s office, and it takes about 15 to 30 minutes. A thin catheter is inserted through your cervix, and a contrast dye is pushed into your uterus. If your tubes are open, the dye flows through them and spills out the ends, which shows up clearly on the X-ray. If the dye stops or doesn’t appear in one or both tubes, that suggests a blockage.
The procedure can cause cramping that ranges from mild to moderately uncomfortable. Johns Hopkins Medicine recommends taking ibuprofen or acetaminophen about 30 minutes beforehand to help manage the discomfort. The cramping typically subsides quickly after the test is finished. HSG is usually scheduled in the first half of your menstrual cycle, after your period ends but before ovulation.
One important caveat: HSG can sometimes show a false blockage, particularly at the point where the tube meets the uterus. A brief muscle spasm during the procedure can temporarily close the tube’s opening, making it look blocked when it isn’t. For this reason, an abnormal HSG result often leads to further testing rather than an immediate diagnosis.
Ultrasound-Based Alternatives
A newer option called HyCoSy (hysterosalpingo-contrast sonography) uses ultrasound instead of X-rays. Saline or a special contrast agent is pushed through the uterus while an ultrasound probe tracks the fluid’s path through the tubes. It avoids radiation exposure and can be done in a standard gynecology office.
A meta-analysis comparing HyCoSy to other imaging methods found it has a pooled sensitivity of 89% and specificity of 93% for detecting tubal patency, meaning it correctly identifies both open and blocked tubes the vast majority of the time. Newer 3D and 4D versions using microbubble contrast agents perform even better, with sensitivity reaching 95% and specificity of 94%. Your doctor may recommend HyCoSy as a first-line option, especially if they want to evaluate your uterus and ovaries at the same time.
Laparoscopy: The Gold Standard
The most definitive way to evaluate your tubes is a laparoscopy with chromotubation. This is a surgical procedure done under general anesthesia. A small camera is inserted through a tiny incision near your navel, giving the surgeon a direct view of your tubes, ovaries, and surrounding pelvic structures. Colored dye is then pushed through the uterus, and the surgeon watches to see whether it flows out the ends of each tube.
This test is considered the gold standard because it doesn’t just show whether the tubes are open or closed. It reveals the cause of any blockage, whether that’s scar tissue, adhesions, endometriosis, or a fluid-filled tube. The surgeon can sometimes treat the problem during the same procedure, removing adhesions or opening a blocked tube end. It’s not typically the first test ordered because it requires anesthesia and carries the small risks of any surgery, but it’s recommended when imaging results are unclear or when there’s a strong suspicion of endometriosis or other pelvic pathology that needs visual confirmation.
What Happens After a Diagnosis
If only one tube is blocked and the other is open, many women can still conceive naturally, though it may take longer. Treatment decisions for bilateral blockage (both tubes) depend on where the blockage is, what’s causing it, and your age.
For blockages near the uterus (proximal blockage), a procedure called tubal cannulation can sometimes clear the obstruction. A thin catheter is threaded through the uterus and into the blocked portion of the tube to open it. A review of studies found that cannulation successfully reopens tubes about 70% of the time, with a subsequent pregnancy rate of 33% and a live birth rate of 26%. One study reported even better outcomes: among women who had at least one tube successfully reopened, 43% became pregnant within two years.
For blockages at the far end of the tube or damage caused by hydrosalpinx, surgical repair (tuboplasty) is an option, particularly when the disease is mild. Live birth rates after salpingostomy, a procedure that creates a new opening in a sealed tube, range from 20% to 37%. In cases of mild tubal disease, those rates climb to 40% to 60%. Surgery is less expensive than IVF and allows you to attempt conception naturally over multiple cycles, which can add up to a meaningful cumulative advantage in younger women without other fertility issues.
IVF bypasses the tubes entirely by retrieving eggs directly from the ovaries and fertilizing them in a lab. For severe tubal damage, bilateral blockage that can’t be repaired, or women over 35 who don’t want to wait through months of natural attempts after surgery, IVF is often the most efficient path. Reproductive specialists generally view tubal surgery and IVF as complementary options rather than competing ones, and the right choice depends on the specifics of your situation.