Tubal factor infertility is difficulty getting pregnant because one or both fallopian tubes are blocked, scarred, or otherwise damaged. These tubes help sperm reach an egg and carry a fertilized egg toward the uterus. Tubal damage can prevent fertilization or make it harder for an embryo to travel normally. It may follow an infection, endometriosis, or pelvic surgery, and fertility tests can help identify the problem.
How do the fallopian tubes affect fertility?
The fallopian tubes are two narrow passages that connect the area near the ovaries to the uterus. After an ovary releases an egg, the nearby tube helps collect it. Sperm usually travel through the uterus into a fallopian tube, where fertilization takes place. The resulting embryo then moves through the tube toward the uterus, where it may implant and develop into a pregnancy.
According to the Cleveland Clinic, the fallopian tubes are essential to conception because they provide the meeting place for the egg and sperm and allow the fertilized egg to travel toward the uterus. When these tubes are blocked or damaged, sperm may be unable to reach an egg, or a fertilized egg may have difficulty reaching the uterus.
Tubal factor infertility can involve one fallopian tube or both. The extent of the problem matters. A partial blockage, scarring that affects how a tube functions, and complete blockage can have different effects on fertility. A tube may also be physically open but damaged in ways that interfere with its normal function.
What causes tubal factor infertility?
Tubal factor infertility usually develops when inflammation, infection, scarring, or another structural problem affects the fallopian tubes. The NHS identifies pelvic inflammatory disease, endometriosis, and scarring after surgery among the causes of fertility problems involving the fallopian tubes.
- Pelvic inflammatory disease (PID): This infection affects the reproductive organs, including the uterus and fallopian tubes. It is often associated with sexually transmitted infections such as chlamydia and gonorrhea. Inflammation can lead to scarring that blocks or damages the tubes.
- Endometriosis: This condition occurs when tissue similar to the lining of the uterus grows elsewhere in the body. It may affect the fallopian tubes or cause scar tissue and adhesions, which are bands of tissue that can restrict normal movement around the reproductive organs.
- Previous pelvic or abdominal surgery: Surgery involving the reproductive organs or nearby structures may lead to adhesions or other changes that affect the fallopian tubes. Procedures performed for an ectopic pregnancy can also be relevant to a person's fertility history.
- Hydrosalpinx: This occurs when a fallopian tube becomes blocked and fills with fluid, often following inflammation or injury. The condition can affect the tube's function and may influence the success of some fertility treatments.
- Other structural damage: Congenital differences or other conditions affecting the development or structure of the fallopian tubes can interfere with their normal function.
Having one of these risk factors does not automatically mean that infertility will occur. The effect depends on the location and extent of any damage and whether other factors affecting conception are present.
What are the symptoms of tubal factor infertility?
Tubal factor infertility often has no obvious symptoms. Difficulty becoming pregnant may be the first indication that a fertility assessment is needed. According to Mayo Clinic, female infertility may occur without other noticeable signs, although symptoms can be present when an underlying condition affects reproductive health.
Depending on the cause, some people may experience:
- Persistent or recurring pelvic pain
- Pain during sexual intercourse
- Unusually painful menstrual periods
- Unusual vaginal discharge, which may occur with an infection
These experiences are not specific to tubal damage. For example, pelvic pain and painful periods can occur with endometriosis or other gynecological conditions. Some infections can also cause few or no noticeable symptoms. A healthcare professional considers the overall medical history and appropriate examination and test findings when assessing possible causes of fertility problems.
How is tubal factor infertility diagnosed?
Diagnosis usually involves a fertility assessment that examines the fallopian tubes alongside other factors that may affect conception. A healthcare professional may ask about previous pregnancies, pelvic infections, sexually transmitted infections, endometriosis, menstrual history, and abdominal or pelvic surgery. The assessment may also include a physical examination and tests to evaluate ovulation, ovarian function, the uterus, and sperm health.
Hysterosalpingography (HSG)
A common test for checking whether the fallopian tubes are open is hysterosalpingography, or HSG. The clinician passes a thin tube through the cervix and introduces a contrast dye into the uterus. X-ray images show the shape of the uterine cavity and whether the dye passes through the fallopian tubes. The NHS guide to infertility diagnosis describes HSG as a test used to identify possible blockages that could prevent an egg from travelling through a tube toward the uterus.
HSG can cause temporary discomfort or cramping. Its findings also need to be interpreted in context. A result suggesting a blockage, particularly near the uterus, does not always establish that a tube is permanently blocked. Further assessment may be appropriate before treatment decisions are made.
Other tests that may be needed
A pelvic ultrasound can help identify structural changes or conditions such as hydrosalpinx. Depending on the findings and medical history, a specialist may recommend additional procedures. Laparoscopy is a minimally invasive operation in which a small camera is inserted through an incision in the abdomen to examine the pelvic organs. It may help identify endometriosis, adhesions, or tubal abnormalities when there is a specific reason to suspect them.
No single test provides a complete picture of fertility. Clinicians combine the results with age, reproductive history, other fertility findings, and the length of time a person has been trying to conceive to determine the next steps.
What treatments are available for tubal factor infertility?
Treatment depends on the type and location of tubal damage, whether one or both tubes are affected, and whether other fertility factors are present. Options may include treating an active infection, selected procedures to repair or open a tube, or assisted reproductive technology such as in vitro fertilization (IVF). Not every type of tubal damage can be repaired, and opening a tube does not guarantee pregnancy.
Can surgery repair a blocked or damaged fallopian tube?
Some people may benefit from surgery, particularly when the blockage is in a location that can be treated or the damage is limited. For certain blockages near the uterus, a procedure called tubal cannulation may be used to try to open the tube. Other operations may address selected cases of scar tissue or damage near the end of a fallopian tube.
Whether surgery is appropriate depends on the likely benefits and risks. Tubal surgery can be followed by an ectopic pregnancy, in which a fertilized egg implants outside the uterus. Extensive damage may make reconstructive surgery less suitable, so a fertility specialist can help compare surgical options with IVF.
How does IVF help with tubal factor infertility?
In vitro fertilization, or IVF, allows fertilization to take place outside the body. Eggs are collected from the ovaries and combined with sperm in a laboratory. An embryo can then be transferred into the uterus, bypassing the need for the fallopian tubes to carry the egg and embryo.
IVF may be recommended when both tubes are blocked, when tubal damage is extensive, or when surgery is unlikely to provide a suitable outcome. It can also be an option for people who have had their fallopian tubes removed. The decision depends on the whole fertility picture rather than the condition of the tubes alone.
What happens if a fallopian tube has hydrosalpinx?
Hydrosalpinx requires particular consideration when IVF is planned. Fluid in the affected tube can reduce the likelihood of successful IVF treatment. In selected cases, a specialist may recommend removing the affected tube or blocking it off from the uterus before proceeding with IVF.
The American Society for Reproductive Medicine explains that decisions about tubal surgery and IVF depend on factors such as age, ovarian reserve, sperm health, the location and extent of tubal disease, other fertility conditions, surgical risks, and personal preferences. A fertility specialist can help determine which approach best fits the clinical circumstances.
Can you get pregnant with tubal factor infertility?
Yes, pregnancy may still be possible. If one fallopian tube is damaged but the other is healthy and functioning, natural conception may occur. The likelihood depends on the extent of the tubal problem and whether other factors affect fertility.
When both tubes are completely blocked or severely damaged, natural conception may be much less likely. IVF can provide another route to pregnancy because it bypasses the tubes. For some people, surgery is an option, while others may benefit more from IVF or another approach based on their individual assessment.
Tubal damage can also increase the risk of an ectopic pregnancy, in which an embryo implants outside the uterus. This is an important consideration when choosing treatment and planning follow-up after conception. Anyone with a history of tubal disease or surgery should discuss pregnancy monitoring with their healthcare professional.
When should you seek a fertility assessment?
Consider a fertility evaluation if pregnancy has not occurred despite regular, unprotected intercourse, or sooner if there is a known history of pelvic inflammatory disease, endometriosis, ectopic pregnancy, or pelvic surgery that may affect fertility. The timing of an assessment depends partly on age. Mayo Clinic advises seeking evaluation after 12 months of trying for people younger than 35, after six months for those aged 35 to 40, and potentially without delay for those older than 40. Earlier assessment may be appropriate when a fertility problem is already suspected.
Understanding whether the fallopian tubes are open and functioning can help guide treatment, but the assessment should consider both partners and other factors that affect conception. A reproductive specialist can explain the available options, their expected benefits and limitations, and the risks that may apply to a particular situation.