Losing or blocking one fallopian tube usually makes pregnancy only somewhat harder, not unlikely, as long as the other tube is healthy. Only one egg is usually released each month, so one working tube is often all a cycle needs. For most women the real question is the condition of the tube that remains, which is why the reason a tube was lost matters more than how many you have.
How One Tube Can Still Catch Eggs From Either Ovary
In fertile women, eggs come from the right or left ovary about equally often, with no fixed alternating pattern.1Oxford Academic (Human Reproduction). Side of ovulation and cycle characteristics in normally fertile women With one tube, that means roughly half of your cycles release an egg on the side without a tube. The remaining tube can reach across and pick up an egg released by the opposite ovary.2Fertility Centers of New England. Can I Get Pregnant With One Fallopian Tube?
The ovary and the tube are not attached. The egg floats out into the small pelvic space between them, and the fringed end of the tube sweeps it in. That gap is why the far tube can sometimes catch an egg from the other side.
After one tube was removed for an ectopic pregnancy, about 1 in 3 natural pregnancies came from an egg released on the opposite side.3Human Reproduction. Ovum transmigration after salpingectomy for ectopic pregnancy That figure held even when each woman was counted only once.4Ultrasound in Obstetrics & Gynecology. OP05.01: What proportion of intrauterine pregnancies result from ovum transmigration after salpingectomy for ectopic pregnancy? Even so, cycles where the egg comes from the side without a tube succeed less often than same-side cycles.
Because crossover happens, trying every month makes sense for natural conception. Ovulation-side tracking mainly matters in treatment cycles like IUI, covered later.
You also can’t feel which side released the egg in any dependable way. Mid-cycle twinges are not a reliable clue, and only an ultrasound or monitored cycle can tell you for sure.
Ovulation tests and tracking apps show your fertile window, and that window is the same whichever side the egg comes from. Having sex every day or two across it covers both kinds of months without extra planning.
How Much Your Natural Chances Change
Natural pregnancy is still possible with one tube, with chances estimated at 15 to 45% lower than with two.5Instituto Bernabeu. Can I get pregnant with only one fallopian tube or none? That figure describes your chance in each cycle, not a cut in your overall chance of ever conceiving. A lower monthly chance mainly stretches the time it takes, so it may take a few more months of trying rather than being ruled out. The range is wide because it blends women with very different tube health, ages, and histories.
Surgeons treating an ectopic pregnancy either remove the tube or open it and keep it. When the other tube was healthy, about 56% had an ongoing pregnancy after removal versus about 61% after keeping the tube, a difference too small to be meaningful.6PubMed. Salpingotomy versus salpingectomy in women with tubal pregnancy (ESEP study): an open-label, multicentre, randomised controlled trial Pooled trials also found no real difference in later womb pregnancies between the two surgeries.7PubMed. A Systematic Review and Meta-analysis of Surgical Treatment of Ectopic Pregnancy with Salpingectomy versus Salpingostomy
Studies that simply followed women over time told a different story: those who had a tube removed were less likely to conceive, especially if they had risk factors for tube damage.8PubMed. A Systematic Review and Meta-analysis of Surgical Treatment of Ectopic Pregnancy with Salpingectomy versus Salpingostomy The two kinds of study disagree because trials compared similar women, while long-term records include women with more tube damage. Women with damaged tubes tend to have both tubes affected, which lowers the odds. So the other tube’s condition largely sets your odds.
The reassuring trial result applies mostly to women whose other tube looked healthy. If yours was already scarred or blocked, your surgeon’s notes matter more.
Age, past infertility, earlier pelvic surgery or infections, and whether the remaining tube is open all affect future fertility.9PubMed Central. Fertility and reproductive outcome after tubal ectopic pregnancy: comparison among methotrexate, surgery and expectant management A first ectopic pregnancy in an otherwise healthy pelvis generally points to better odds than one that came with pelvic infection or endometriosis. Age is often the biggest single factor, because egg quality and the number of cycles you have available both change with time. A fertility specialist can combine your history, the remaining tube, and your age into a personal estimate.
Why Your Ovaries and Egg Supply Usually Stay the Same
Removing one or both tubes did not change AMH, a blood test of egg supply, or the number of small egg follicles seen on ultrasound.10PubMed Central. Impact of unilateral and bilateral salpingectomy on ovarian reserve This held regardless of which side was removed and in women under 40.11PubMed. Ovarian reserve after salpingectomy: a systematic review and meta-analysis Hormone levels like FSH and estrogen, and ovary size, were also unchanged after tube removal during hysterectomy.12PubMed. Total salpingectomy during abdominal hysterectomy: effects on ovarian reserve and ovarian stromal blood flow Blood-flow measurements in the ovaries did shift after surgery, but hormone output did not change.13PubMed. Total salpingectomy during abdominal hysterectomy: effects on ovarian reserve and ovarian stromal blood flow The ovary makes eggs and hormones on its own and gets its main blood supply separately from the tube, so taking out the tube leaves that work intact.
In daily life, both ovaries keep releasing eggs and making hormones as before, and your periods should not change because of tube loss itself. If your cycles do change, that deserves its own check rather than blame on the missing tube.
Your Risk of Another Ectopic Pregnancy
A past ectopic pregnancy raises the chance of another about fourfold.14Open Access Journal of Gynecology. Recurrent Ectopic Pregnancy in Distal Remaining Portion of Fallopian Tube Following Proximal Ipsilateral Salpingectomy After tube removal, about 5% had another ectopic, versus about 8% when the tube was kept.15PubMed. Salpingotomy versus salpingectomy in women with tubal pregnancy (ESEP study): an open-label, multicentre, randomised controlled trial After two ectopic pregnancies, the risk of a third rose about tenfold, and only about 4% went on to a natural full-term pregnancy.16PubMed Central. Recurrent Ectopic Pregnancy: Current Perspectives
Fourfold sounds alarming, but ectopic pregnancy is uncommon to begin with, so most pregnancies after one are still in the womb. The numbers are a reason for early checking, not a reason to avoid trying.
Contact your doctor as soon as a home pregnancy test is positive so they can confirm early that the pregnancy is in the womb. An ectopic pregnancy can produce a positive test and normal early symptoms, so you can’t tell by how you feel. Calling early lets your doctor schedule blood tests and a scan before any pain starts.
Early monitoring usually means blood hCG tests repeated a couple of days apart to see whether levels rise normally, and an ultrasound around 5 to 6 weeks to see where the pregnancy is. Catching it early often allows medicine instead of surgery, which protects the remaining tube.
Seek urgent care for one-sided pelvic pain, shoulder pain, dizziness, or heavy bleeding in early pregnancy. The remaining tube deserves care because the same damage that caused the first ectopic may affect it too. Protecting it means treating infections promptly and not smoking.
When to Get Your Remaining Tube Checked
An HSG, an X-ray taken while dye flows through the uterus and tubes, is the standard test for whether a tube is open or blocked.17PubMed. Evaluating Fallopian Tube Patency: What the Radiologist Needs to Know It can also spot a fluid-swollen tube or scarring.18PubMed. Evaluating Fallopian Tube Patency: What the Radiologist Needs to Know If you’ve had infections, endometriosis, or pelvic surgery, ask for the dye X-ray before trying for many months.
A healthy-looking history does not prove the remaining tube is open, because tubes can be blocked without any symptoms. Since an ectopic pregnancy may mean tube damage, many specialists suggest the check early, even before the usual waiting period passes.
The test is done just after a period ends, before ovulation. It takes about 15 minutes, and cramping is common, so a pain reliever beforehand helps. Results are often visible on screen right away.
Dye that spills freely out of the end of the tube suggests it is open, the main reassurance you want. The test doesn’t show how well the tube’s lining or fringed end works, so a normal result is not a guarantee. Sometimes a tube looks blocked because it went into spasm, so a doctor may repeat the test or use another method before deciding.
See a specialist after 12 months of trying if you’re under 35, or after 6 months if you’re 35 or older. Go sooner after two ectopic pregnancies or a known damaged tube. Bring surgery notes describing the condition of the remaining tube.
Fertility Treatment Options With One Tube
IUI places sperm in the uterus but still relies on a tube to carry the egg. Doctors may cancel an IUI cycle if the egg is released on the blocked or missing side.19Thomson Medical. IUI with One Blocked Fallopian Tube: What You Need to Know Or they may use fertility drugs to stimulate both ovaries so an egg likely comes from the open side.20Thomson Medical. IUI with One Blocked Fallopian Tube: What You Need to Know
In a timed cycle, ultrasound scans track follicles, so the clinic can see which ovary is about to release an egg. If it’s on the side with the tube, insemination is done around ovulation; if not, the cycle may be skipped or changed. Drugs that produce several eggs raise the chance of twins or more, so the doctor monitors closely.
IVF fertilizes eggs in a lab and places the embryo in the uterus, skipping the tubes altogether. It’s the main route if the remaining tube is damaged or after repeat ectopic pregnancies. Skipping the tubes also lowers the risk of an embryo implanting in a damaged tube, though an ectopic pregnancy can still occasionally happen. Doctors often suggest IVF directly when both tubes are lost or blocked, and some women move to it after a few unsuccessful IUI cycles.
IUI is cheaper and less invasive but needs an open tube. IVF costs more but doesn’t depend on tube health or ovulation side.