Fertility After an Ectopic Pregnancy: What the Data Shows

The honest picture, with numbers

An ectopic pregnancy is a pregnancy that implants outside the uterus, most often in a fallopian tube. In the UK, the RCOG puts it at 1 in 90 pregnancies — just over 1% — which the NHS translates to around 11,000 pregnancies a year. Between 3 and 5 out of every 100 ectopic pregnancies occur somewhere other than a tube.

The question almost everyone asks afterwards is what this means for the next pregnancy. The answers are better than the fear usually allows:

• The RCOG states that the chances of a successful pregnancy in the future are good, and that even with only one fallopian tube, your chances of conceiving are only slightly reduced.
• The Ectopic Pregnancy Trust puts numbers on it: 65% of women are healthily pregnant within 18 months of an ectopic pregnancy, and some studies suggest that rises to around 85% over two years.
• The risk of another ectopic pregnancy is genuinely raised, but not to the level most people imagine: the RCOG gives 7 to 10 in 100 (7–10%), against just over 1% in the general UK population. The NHS gives around 10%. Put the other way round, roughly 9 in 10 subsequent pregnancies are in the right place.
• For most women, the RCOG says, an ectopic pregnancy is a one-off event.

One anatomical fact defuses a specific and common fear. If you have had a tube removed, an egg released from the ovary on that side is not a wasted cycle. The tubes are not attached to the ovaries, and the fimbriae at the end of a tube can collect an egg from either side. The Ectopic Pregnancy Trust states that approximately one-third of pregnancies result from the egg being picked up by the tube on the opposite side to the ovary that released it. Nor do you ovulate strictly from alternating sides — the pattern varies from person to person and month to month.

What actually affects it

Which treatment you had

The three treatments have different implications, and the RCOG says your future pregnancy plans should be part of the discussion before a decision is made.

• Expectant management — monitoring hCG until it falls. Success rates vary widely (30% to 100%), depending mainly on the hormone level.
• Methotrexate — most women need one injection; 15 in 100 need a second, and 7 in 100 need surgery even after medical treatment. Methotrexate is not known to affect the ovaries' capacity to produce eggs.
• Surgery — usually laparoscopic. To give the best chance of a future pregnancy in the uterus and reduce the risk of another ectopic, the affected tube is usually removed (salpingectomy). Where the other tube is absent or unhealthy, salpingotomy — removing the pregnancy but keeping the tube — may be advised instead; it carries a higher risk of a future ectopic and requires hCG follow-up.

The state of the remaining tube

The Ectopic Pregnancy Trust notes that how long conception takes depends on the health of your remaining tube or tubes, your age, your general and reproductive health, and how often you have sex. If you had surgery, ask the surgeon what they saw — the operation note contains information about the other tube that is often never passed on.

Smoking

This is the one clearly modifiable risk factor for ectopic pregnancy specifically. The Ectopic Pregnancy Trust, citing research from the University of Edinburgh on cotinine and the PROKR1 protein in the fallopian tubes, notes that study results vary but smoking probably increases the risk of an ectopic pregnancy by between 50% and 200%. Stopping reduces that risk as well as improving general fertility.

Other risk factors

The RCOG lists: a previous ectopic pregnancy; a damaged fallopian tube from previous tubal surgery including sterilisation, or previous tubal infection; conceiving with an IUD in place or on the progestogen-only pill; conception through IVF or ICSI; and smoking.

How long to wait, and why

The waiting advice is specific to the treatment you had, and it exists for reasons worth knowing:

• After methotrexate: wait 3 months. The RCOG and NHS both advise this. The Ectopic Pregnancy Trust adds the reasoning — methotrexate depletes folate, so once your hCG has fallen below the threshold your team specifies, take a folic acid supplement for 12 weeks before trying. Methotrexate can affect cell quality, including egg quality, and liver function, for up to three months.
• After surgery or expectant management: two full menstrual cycles. The bleed in the first week or so after treatment is not a period — it is the womb lining shedding as pregnancy hormones fall. Two proper periods give your cycle time to re-establish and, critically, give a reliable date from which to time an early scan in the next pregnancy.
• Contraception matters in the meantime. Ovulation can happen roughly 14 days after surgical treatment and during methotrexate treatment, before any period arrives. If you are having sex and not ready to conceive, use contraception.

The emotional timing is separate and equally legitimate. The RCOG puts it plainly: before trying again, wait until you feel ready emotionally as well as physically. There is no correct interval.

What to do next

1. Tell whoever confirms your next pregnancy that you have had an ectopic. The RCOG advises seeking early advice as soon as you know you are pregnant, and you may be offered an ultrasound scan at 6 to 8 weeks to confirm the pregnancy is in the uterus. This is the single most useful thing you can do.
2. Find your nearest Early Pregnancy Assessment Unit now, before you need it. The RCOG points to the Association of Early Pregnancy Units directory. Save the number.
3. Take folic acid, ideally for 12 weeks before conceiving — and necessarily so after methotrexate.
4. Ask what your operation note says about the tube that was left.
5. Have regular sex rather than a schedule. The Ectopic Pregnancy Trust's practical version is intercourse every 2 to 3 days, which is also NICE's recommendation.
6. If you have ongoing abdominal pain after the ectopic, see your GP — persistent infection or other pelvic problems can affect future fertility and are treatable.

When to seek help

Urgently, in any future pregnancy: one-sided lower abdominal pain, unusual vaginal bleeding, pain at the tip of your shoulder, or pain on opening your bowels. Shoulder-tip pain and collapse are emergencies. The RCOG's advice is to seek help immediately if you have had sex in the last 3 or 4 months and have these symptoms, even if you did not think you could be pregnant. Contact your GP, an Early Pregnancy Assessment Unit, A&E, or NHS 111 (NHS 24 in Scotland).

For fertility: NICE NG257 confirms that if you have an ectopic pregnancy during the year of unprotected intercourse that qualifies you for fertility investigations, that timeframe continues rather than restarting. The same applies during expectant management for unexplained infertility and during a course of artificial insemination. If a clinician tells you the clock has reset, that recommendation is worth naming.

Support

The Ectopic Pregnancy Trust (ectopic.org.uk) runs a support line on 020 7096 1838 with call-back requests, an email service, a forum and virtual support groups, and its patient information is medically reviewed by consultant gynaecologists. Miscarriage UK also supports people affected by ectopic pregnancy, with a helpline on 0303 003 6464.

The RCOG names something that often goes unspoken: the impact of an ectopic pregnancy can mean coming to terms with the loss of a baby, with the potential effect on future fertility, and with the realisation that you could have lost your life. That is three separate things at once. If you are not getting back to normal, that is a reason to talk to your GP, not a failure of resilience.