Ectopic Pregnancy: Signs, Diagnosis & Treatment

An ectopic pregnancy is one that implants outside the uterine cavity, almost always in a fallopian tube. It affects 1 to 2 in every 100 pregnancies, and it accounts for around 2.7% of pregnancy-related deaths — a figure that persists not because the condition is untreatable but because it is missed or presented late.

This article covers what causes it, how it is diagnosed, why a single hCG number rarely settles anything, what the treatment options genuinely are, and what it means for trying again.

Who is at higher risk?

Around half of women who have an ectopic pregnancy have no identifiable risk factor at all, which is why the symptoms matter more than the risk profile. That said, the recognised factors are:

• Previous ectopic pregnancy. Recurrence is around 10% after one, and over 25% after two or more.
• Previous tubal surgery, including sterilisation and reversal.
• Previous pelvic infection, particularly chlamydia, which damages the tubal lining.
• Endometriosis and pelvic adhesions.
• Assisted conception, including IVF.
• Smoking.
• Conception with an intrauterine device in place. An IUD is highly effective at preventing pregnancy overall, but if a pregnancy does occur with one in situ, a high proportion — reported at around 53% — are ectopic. Our page on contraception covers how the methods compare.

What are the symptoms?

The classic triad is a missed period, one-sided pelvic pain and vaginal bleeding, but relying on the full triad is exactly how ectopics get missed. Many women present with only pain. Some present with bleeding they assume is a late period. Some have no bleeding at all.

The practical rule is simple: pelvic pain in a woman of reproductive age needs a pregnancy test. If the test is positive and there is pain, an ectopic must be excluded rather than assumed against.

Other features worth knowing: bleeding in an ectopic is often darker and less heavy than a period, sometimes described as prune-coloured; gastrointestinal symptoms such as diarrhoea or pain on opening the bowels are surprisingly common; and pain at the tip of the shoulder, which many women dismiss, is a sign of intra-abdominal blood and is urgent.

How is it diagnosed?

Two tests together, and the interpretation depends on both.

Transvaginal ultrasound

This is the gold standard. It can identify a pregnancy in the tube directly, and in many cases makes the diagnosis outright. It also answers the more common question early on, which is whether there is a pregnancy inside the uterus.

Serial beta hCG

The pregnancy hormone level is used alongside the scan, and the trend matters far more than any single value:

• A viable intrauterine pregnancy typically shows a rise of at least 49% over 48 hours when the starting level is below 1,500 mIU/mL. A rise slower than expected raises concern.
• Above roughly 2,000 mIU/mL with no pregnancy visible inside the uterus on a transvaginal scan, an ectopic becomes highly likely.
• A discriminatory level of up to 3,500 mIU/mL is used by some units before calling a scan definitive, deliberately conservative so that a viable intrauterine pregnancy is not misdiagnosed.
• A falling level usually indicates a failing pregnancy, but does not by itself exclude an ectopic, so follow-up continues until the level is negative.

A note on multiple pregnancy: hCG levels are higher with twins, which is one of several reasons a number is never read in isolation.

Pregnancy of unknown location

This is the term used when a pregnancy test is positive but no pregnancy can be seen anywhere on a scan — not in the uterus, not in the tube. It is a common and often frightening situation, and it is not a diagnosis but a stage of the assessment. It resolves in one of three directions: an intrauterine pregnancy that was simply too early to see, a failing pregnancy, or an ectopic. Serial hCG measurement and repeat scanning distinguish them, which is why the follow-up appointments are not optional.

Scans in this practice are arranged by referral, and where an ectopic is suspected that referral is same-day rather than routine.

How is it treated?

There are three approaches, and which is appropriate depends on how stable you are, the hCG level, the size of the ectopic, and whether cardiac activity is seen.

When methotrexate is not appropriate

It is not offered where you are unstable, where there is cardiac activity in the ectopic, or where the hCG is high — above roughly 5,000 mIU/mL success falls substantially. It also requires that you can attend for repeated blood tests and get to hospital quickly if pain develops, which is a genuine practical consideration.

If you have methotrexate, avoid alcohol, avoid non-steroidal anti-inflammatory painkillers, avoid folic acid supplements and stay out of strong sun, and do not conceive until you have been advised it is safe to do so.

Salpingectomy or salpingostomy?

This is the question women ask most often before surgery, and the honest answer is more reassuring than most expect.

Salpingectomy removes the affected tube. Salpingostomy opens the tube, removes the pregnancy and leaves the tube in place. It is natural to assume that keeping the tube must be better for future fertility.

The evidence does not show that. Comparing the two, subsequent intrauterine pregnancy rates are similar, and recurrence rates are similar. What salpingostomy adds is a risk of persistent trophoblast — pregnancy tissue left behind that keeps producing hCG and needs further treatment — and therefore a need for follow-up blood tests that salpingectomy does not require.

Where salpingostomy genuinely earns its place is when the other tube is absent or damaged. Where the other tube is healthy, removing the affected one is usually the cleaner decision. Our page on laparoscopy covers what keyhole surgery involves and the recovery.

Will I be able to get pregnant again?

Most women do. Having one tube removed does not halve your fertility in the way the arithmetic suggests, because ovulation alternates and the remaining tube can pick up an egg from either ovary.

Two specific points that come up constantly:

• Methotrexate does not harm future fertility. This is well established and worth hearing plainly, because the word chemotherapy attaches to the drug and frightens people unnecessarily.
• Your risk of another ectopic is higher — around 10% after one, and over 25% after two or more. That is not a reason to avoid pregnancy. It is a reason to have an early scan next time, at around six weeks, to confirm the pregnancy is in the right place.

On timing, most units advise waiting until you have had at least one normal period, and longer after methotrexate — usually three months — because of its effect on folate. Our guide to planning a pregnancy after a loss covers the emotional side of trying again, which is the part nobody prepares you for.

The grief nobody names

An ectopic pregnancy is two losses at once: a pregnancy, and often a fallopian tube, in the space of a few days, usually as an emergency, frequently before anyone else even knew you were pregnant. Women are discharged physically well and emotionally unaddressed, and are then surprised when they are not fine three weeks later.

That reaction is normal and it deserves acknowledgement rather than management. If you are still struggling weeks or months later, say so at a follow-up appointment. It is a reason to be seen, not an overreaction.

Getting assessed in Gurugram

If you have a positive test and pain, this is an emergency and the right place is a hospital with theatre facilities, not an outpatient appointment. Do not wait for a clinic slot.

For early pregnancy that is not an emergency — a positive test with a previous ectopic, an early scan to confirm location, or follow-up after treatment — consultation and blood tests including beta hCG are done at the clinic, and scans are arranged by referral, urgently where the situation requires it.

Where to see us

Dr. Anam's Women Health Clinic, Sector 51 (Mayfield Garden) and Sector 56, Gurugram. Open seven days a week, including Sundays.

The bottom line

Ectopic pregnancy is uncommon, treatable, and dangerous mainly when it is diagnosed late. The symptoms that matter are one-sided pain, shoulder-tip pain and faintness with a positive test, and any of them warrants a hospital the same hour.

If you have had one, the outlook for a future pregnancy is good, methotrexate has not damaged your fertility, and the single most useful thing you can do next time is arrange an early scan to confirm where the pregnancy is.