Quick answer. An ectopic pregnancy is a pregnancy that develops outside the womb, most often in a fallopian tube, and it cannot survive or be moved into the womb. It is a medical emergency: if the tube ruptures it can cause life-threatening internal bleeding, so severe pelvic pain, dizziness or fainting and shoulder-tip pain in early pregnancy mean you should call 995 immediately.
An ectopic pregnancy happens when a fertilised egg implants and grows outside the womb, usually in one of the fallopian tubes. Because these structures cannot support a growing pregnancy, an ectopic pregnancy is not viable and, if left untreated, can cause the tube to rupture and bleed heavily. This makes it one of the most important early-pregnancy emergencies for women in Singapore to recognise.
The reassuring part is that, caught early, an ectopic pregnancy can be treated safely and effectively. This guide explains what an ectopic pregnancy is, the warning signs to take seriously, how it is diagnosed, and the treatment options, with a clear emphasis on the emergency signs that mean you must seek help without delay.
At a glance
| Sign | What it may feel like | What to do |
|---|---|---|
| Early symptoms | One-sided pelvic or tummy pain, light bleeding | See a doctor urgently for assessment |
| Vaginal bleeding | Lighter, darker or different from a normal period | Get checked, especially in early pregnancy |
| Shoulder-tip pain | Unusual pain at the tip of the shoulder | Possible internal bleeding, call 995 |
| Severe pain | Sudden, intense pelvic or abdominal pain | Treat as an emergency, call 995 |
| Feeling faint | Dizziness, fainting, pale, clammy skin | Possible rupture and shock, call 995 |
What is an ectopic pregnancy?
An ectopic pregnancy is a pregnancy that implants outside the lining of the womb. In the great majority of cases this is in a fallopian tube, which is why it is sometimes called a tubal pregnancy, though it can occasionally occur in other sites. Because the fallopian tube is narrow and cannot stretch to accommodate a growing pregnancy, an ectopic pregnancy cannot develop normally and cannot be relocated into the womb.
If an ectopic pregnancy continues to grow, it can stretch and eventually rupture the tube, causing serious internal bleeding. This is why an ectopic pregnancy is treated as a medical emergency. It usually shows itself in the early weeks of pregnancy, often before some women even realise they are pregnant, which is why any woman who could be pregnant and has these symptoms should be assessed promptly.
Symptoms and signs
An ectopic pregnancy may cause symptoms in the early weeks, often between weeks four and twelve. Watch for:
- Pain low down on one side of the tummy or pelvis.
- Vaginal bleeding or spotting that is different from a normal period (it may be lighter or darker, or watery).
- The usual signs of early pregnancy, sometimes with a missed period.
- Discomfort when passing urine or opening the bowels.
Emergency signs of a possible rupture, which mean you should call 995 now, include:
- Sudden, severe pelvic or abdominal pain.
- Pain at the tip of the shoulder, especially when lying down.
- Feeling faint, dizzy or collapsing.
- Looking very pale, with a rapid heartbeat or cold, clammy skin.
Some women have few or mild symptoms at first, so any unusual early-pregnancy pain or bleeding deserves prompt assessment.
Causes and risk factors
An ectopic pregnancy happens when the fertilised egg cannot travel normally down the fallopian tube to the womb, often because the tube is damaged or narrowed. Many women have no obvious risk factor, but recognised risk factors include:
- Previous ectopic pregnancy.
- Previous pelvic infection, including pelvic inflammatory disease or sexually transmitted infections that can damage the tubes.
- Previous surgery on the fallopian tubes or pelvis.
- Endometriosis.
- Becoming pregnant while using an intrauterine device (IUD), or after fertility treatment.
- Smoking, and increasing age.
Having a risk factor does not mean an ectopic pregnancy will happen, and many occur with no risk factor at all.
How it is diagnosed
Doctors diagnose an ectopic pregnancy promptly using a combination of tests:
- A pregnancy test to confirm pregnancy.
- A blood test for the pregnancy hormone (beta-hCG), sometimes repeated after a couple of days to see how the level is changing.
- A transvaginal ultrasound scan to look for a pregnancy in the womb; if none is seen but the pregnancy hormone is present, an ectopic pregnancy is suspected.
- A clinical examination of the tummy and pelvis.
- In some urgent cases, a keyhole operation (laparoscopy) is used to look directly and treat at the same time.
If you attend with emergency symptoms, assessment and treatment will happen quickly because of the risk of internal bleeding.
Treatment options
An ectopic pregnancy cannot be saved or moved into the womb, so treatment is aimed at safely ending the ectopic pregnancy and protecting your health. The main options are:
- Expectant management: in selected early cases with low and falling hormone levels and no severe symptoms, careful monitoring may be appropriate, as some ectopic pregnancies resolve on their own.
- Medication: an injection of methotrexate can be used in suitable early cases to stop the pregnancy developing, with follow-up blood tests.
- Surgery: keyhole (laparoscopic) surgery is commonly used, either to remove the affected tube or, sometimes, to remove the pregnancy and preserve the tube. Emergency surgery is needed if the tube has ruptured.
The right option depends on how far the pregnancy has progressed, your hormone levels, whether the tube has ruptured and your wishes, and it is decided together with your gynaecologist. Many women go on to have healthy pregnancies afterwards, though the chance of a future ectopic is somewhat higher.
When to seek help and which specialist
If you could be pregnant and have one-sided pelvic pain or unusual bleeding, see a doctor urgently for assessment, even if the symptoms seem mild. Early diagnosis allows safer, simpler treatment.
An ectopic pregnancy can be a life-threatening emergency. Call 995 or go to the nearest A&E immediately if you have:
- Sudden, severe pelvic or abdominal pain.
- Pain at the tip of your shoulder.
- Dizziness, fainting or collapse.
- Looking very pale, with a fast heartbeat or cold, clammy skin.
These can be signs that a fallopian tube has ruptured and is bleeding internally, which needs emergency treatment without delay.
For diagnosis, treatment and follow-up, a gynaecologist is the specialist who manages ectopic pregnancy. You can find one through our directory of the best gynaecologists in Singapore, but in an emergency go straight to A&E or call 995 first.
Related guides
- Best Gynaecology Clinics in Singapore — our editorial shortlist
- gynaecology clinics directory
- Cervicogenic headache
- Trigeminal neuralgia
- Multiple sclerosis
- Baby blues
- Pelvic inflammatory disease
Sources
- NHS – Ectopic pregnancy
- Mayo Clinic – Ectopic pregnancy
- HealthHub Singapore – Diseases and conditions
- KK Women's and Children's Hospital
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