An ectopic pregnancy happens when a fertilized egg implants and starts to grow outside the main cavity of the uterus, most often in one of the fallopian tubes. Common early symptoms include vaginal bleeding, pain on one side of the lower abdomen, and sometimes shoulder pain or dizziness. Doctors diagnose it with a pregnancy blood test and an ultrasound. Treatment may involve careful monitoring, medication, or surgery. An ectopic pregnancy cannot develop into a healthy baby, and without timely care it can cause life-threatening internal bleeding, so early recognition matters.
What Is an Ectopic Pregnancy?
In a typical pregnancy, the egg is fertilized in the fallopian tube and then travels down into the uterus, where it attaches to the uterine lining and grows. In an ectopic pregnancy, the fertilized egg implants somewhere else. The fallopian tube is by far the most common location, which is why it is sometimes called a “tubal pregnancy.” Less commonly, it can implant in the ovary, the cervix, the abdominal cavity, or in a scar from a previous caesarean section.
These places cannot stretch or supply blood the way the uterus can. As the pregnancy tissue grows, it can damage the surrounding structures. In the fallopian tube, this can lead to a rupture, which causes bleeding inside the abdomen. A ruptured ectopic pregnancy is a medical emergency.
Causes and Risk Factors
Ectopic pregnancy often happens when something slows or blocks the movement of the fertilized egg through the fallopian tube. Damage, inflammation, or scarring in the tube can make this more likely. Factors associated with a higher risk include:
- A previous ectopic pregnancy, which is one of the strongest risk factors.
- Pelvic inflammatory disease (PID) or past sexually transmitted infections such as chlamydia or gonorrhoea, which can scar the tubes.
- Previous surgery on the fallopian tubes or pelvis, including tubal sterilization or surgery to reverse it.
- Endometriosis, which can affect the shape and function of the tubes.
- Fertility problems and fertility treatments, including assisted reproductive techniques.
- Becoming pregnant with an intrauterine device (IUD) in place. IUDs are very effective at preventing pregnancy, but if a pregnancy does occur, it is more likely to be ectopic.
- Smoking, which may affect how the fallopian tubes move the egg.
- Increasing maternal age.
It is important to know that many people who have an ectopic pregnancy have no known risk factors. It is not caused by anything a person did during the pregnancy, such as exercise, work, or sexual activity.
Symptoms of Ectopic Pregnancy
Symptoms usually appear between the 4th and 12th week of pregnancy, but some people have no symptoms at first and only find out during a routine early scan. At the beginning, an ectopic pregnancy may feel like a normal pregnancy, with a missed period, breast tenderness, or nausea, and a positive pregnancy test.
Early warning signs
- Light vaginal bleeding or brown, watery discharge
- Pain in the lower abdomen or pelvis, often on one side
- Discomfort when passing urine or stool
- A missed period with unusual bleeding or pain
Signs of a possible rupture
- Sudden, severe, or sharp pain in the abdomen or pelvis
- Pain at the tip of the shoulder, caused by internal bleeding irritating the nerves under the diaphragm
- Feeling very dizzy, light-headed, or fainting
- Pale, clammy skin and a fast heartbeat
Because bleeding and cramping can also occur in a normal early pregnancy or a miscarriage, symptoms alone cannot confirm an ectopic pregnancy. A medical check is needed.
How Ectopic Pregnancy Is Diagnosed
Your doctor will ask about your symptoms, menstrual history, and any risk factors, and will usually perform a physical and pelvic examination. The main tests are:
- Pregnancy hormone (hCG) blood test. This measures the level of human chorionic gonadotropin. In a healthy early pregnancy, the level usually rises at a predictable rate. Repeating the test after about two days helps doctors see whether the levels are rising as expected.
- Transvaginal ultrasound. A small probe placed in the vagina gives a clear view of the uterus, tubes, and ovaries. The doctor checks whether the pregnancy is inside the uterus and looks for a mass or free fluid elsewhere in the pelvis.
- Other blood tests, such as a blood count and blood group, may be done to check for blood loss and prepare for treatment if needed.
Sometimes the pregnancy is too early to be seen on ultrasound. In this situation, it is called a “pregnancy of unknown location,” and your doctor will monitor you with repeat blood tests and scans until the location is clear. It is very important to attend these follow-up visits.
Treatment Options
An ectopic pregnancy cannot be moved into the uterus and cannot continue to a healthy birth. Treatment aims to protect the mother’s health, prevent serious bleeding, and preserve future fertility where possible. The right option depends on the size and location of the pregnancy, hormone levels, symptoms, and whether there are signs of rupture.
Expectant management (careful monitoring)
In some cases where hormone levels are low and falling and there are few or no symptoms, the pregnancy may resolve on its own. The doctor will arrange regular blood tests until hCG returns to non-pregnant levels. This approach is only suitable for selected patients who can attend follow-up reliably.
Medication
For early ectopic pregnancies without rupture, doctors may offer an injection of a medication that stops the pregnancy cells from growing. The body then gradually absorbs the tissue. Blood tests are repeated over several weeks to confirm the treatment has worked, and some people need further treatment. Your doctor will explain which precautions to follow during this time, such as avoiding certain foods, supplements, or pain relievers.
Surgery
Surgery is needed if the ectopic pregnancy has ruptured, if there is significant internal bleeding, or if medication is not suitable. It is often done by laparoscopy (keyhole surgery) through small cuts in the abdomen. Depending on the situation, the surgeon may remove the pregnancy while keeping the tube (salpingostomy) or remove the affected tube (salpingectomy). In emergencies, an open operation may be required.
What You Can Do
- Know your risk. If you have had a previous ectopic pregnancy, tubal surgery, or pelvic infection, tell your doctor as soon as you have a positive pregnancy test so an early scan can be arranged.
- Do not ignore early symptoms. Bleeding or one-sided pain in early pregnancy deserves prompt evaluation.
- Attend all follow-up appointments and blood tests, even if you feel well.
- Look after your emotional health. Losing a pregnancy can bring grief, anxiety, or guilt. Talking with your partner, family, a counsellor, or a support group can help.
- Protect your reproductive health by practising safer sex, getting treated early for infections, and avoiding smoking.
When to See a Doctor
Seek emergency care immediately if you are pregnant or might be pregnant and have any of the following:
- Sudden or severe pain in the abdomen or pelvis
- Pain in the tip of the shoulder without an obvious cause
- Fainting, severe dizziness, or feeling like you might collapse
- Heavy vaginal bleeding
- Pale, cold, or clammy skin, or a racing heartbeat
Contact your doctor promptly, within the same day if possible, if you have a positive pregnancy test along with light bleeding, spotting, or mild one-sided abdominal pain.
Frequently Asked Questions
Can an ectopic pregnancy be saved or moved to the uterus?
No. With current medical knowledge, an ectopic pregnancy cannot be transferred into the uterus or continue safely. Treatment focuses on protecting the mother’s life and health.
Can I get pregnant again after an ectopic pregnancy?
Many people go on to have healthy pregnancies afterwards, even with only one fallopian tube. However, the risk of another ectopic pregnancy is higher, so it is important to see a doctor early in any future pregnancy for an early ultrasound.
How long should I wait before trying to conceive again?
This depends on the treatment you received and how you are recovering physically and emotionally. Your doctor will advise you on a suitable waiting period, which may be longer after certain medications.
Will a home pregnancy test show if a pregnancy is ectopic?
No. A home test can show that you are pregnant, but it cannot show where the pregnancy is located. Only medical tests, such as an ultrasound and blood hormone measurements, can confirm the location.
Ectopic pregnancy can be frightening, but early diagnosis and timely treatment greatly reduce the risk of serious complications. If you have a positive pregnancy test and notice bleeding, abdominal pain, or any warning signs, or if you have risk factors for ectopic pregnancy, please consult an obstetrician and gynaecologist as early as possible for proper assessment and personalised care.
This article is for general education and does not replace examination, diagnosis, or treatment by a doctor. If you have symptoms or concerns, please consult an obstetrician-gynecologist. See our Medical Disclaimer.