An ectopic pregnancy assessment checks whether a pregnancy is developing inside the uterus or somewhere else, usually in a fallopian tube. During the visit, a healthcare professional asks about your symptoms, reviews your medical history, and may arrange a pregnancy blood test, an ultrasound scan, and a physical examination. These checks help determine whether urgent treatment or further monitoring is needed.
Why might you need an ectopic pregnancy assessment?
You may be referred to an early pregnancy assessment service if you have symptoms that could be related to an ectopic pregnancy, particularly if a pregnancy test is positive. These services assess early pregnancy concerns and help identify pregnancies that may need urgent medical attention.
An ectopic pregnancy occurs when a fertilised egg implants outside the uterus. Most ectopic pregnancies develop in a fallopian tube, which normally carries an egg from an ovary towards the uterus. An ectopic pregnancy cannot develop normally into a baby and can cause serious internal bleeding if the affected area ruptures.
According to the NHS guidance on ectopic pregnancy diagnosis, an assessment may involve a vaginal ultrasound, blood tests, and, in selected cases, keyhole surgery to help establish the diagnosis.
You may be referred because of vaginal bleeding, lower abdominal or pelvic pain, or other symptoms during early pregnancy. An assessment may also be needed when an ultrasound has not yet confirmed where a pregnancy is developing.
What happens when you first arrive?
The healthcare team will first assess your symptoms and general condition. The exact process depends on how you feel, how far along the pregnancy may be, and whether there are signs of a possible complication.
Questions about your symptoms and medical history
A doctor, nurse, or midwife will usually ask about your symptoms, menstrual cycle, pregnancy history, and general health. You may be asked:
- When your last menstrual period started.
- Whether you have taken a pregnancy test and what the result was.
- When your pain or bleeding began and whether it has changed.
- Where you feel pain, including whether it affects one side of your lower abdomen or pelvis.
- Whether you have experienced dizziness, faintness, shoulder pain, or unusual weakness.
- Whether you have had an ectopic pregnancy, pelvic infection, fertility treatment, or surgery involving your reproductive organs.
These questions help the team decide which tests are needed and how quickly they should be performed. You do not need to know every detail of your menstrual cycle or pregnancy history to attend. Share what you know and mention any symptoms that are worrying you.
Checking your general condition
The team may measure your blood pressure, pulse, temperature, and other vital signs. These checks help assess your overall condition and look for signs that you may be losing blood or need urgent medical care.
If you have symptoms suggesting internal bleeding or a ruptured ectopic pregnancy, the team may arrange emergency assessment and treatment rather than continuing with a routine appointment.
Will you have a physical or pelvic examination?
A physical examination may be recommended to help assess your symptoms. Depending on your circumstances, this could include gently examining your abdomen for areas of tenderness. A clinician may also offer a pelvic examination to check for tenderness or other findings that could help guide further investigations.
A pelvic examination is not enough on its own to confirm or exclude an ectopic pregnancy. The clinician will consider the examination findings alongside your symptoms, blood test results, and ultrasound findings.
The healthcare professional should explain what an examination involves and why it may be helpful. You can ask questions before it begins. If you are uncomfortable or worried, tell the clinician so they can discuss your concerns and explain the available options.
What blood tests are used during the assessment?
Blood tests are an important part of assessing a possible ectopic pregnancy. The main test measures human chorionic gonadotropin (hCG), a hormone produced during pregnancy. The result helps the clinical team interpret the ultrasound findings and decide whether more tests are needed.
Measuring pregnancy hormone levels
An hCG blood test measures the amount of pregnancy hormone in your blood. Depending on the findings, the test may need to be repeated, often around 48 hours later, to assess how the level changes over time.
The pattern of hCG levels can provide useful information, but a single result cannot reliably establish where a pregnancy is developing. According to the American College of Obstetricians and Gynecologists (ACOG), clinicians may use blood tests, ultrasound, and a pelvic examination together when assessing a possible ectopic pregnancy.
Other blood tests you may need
The team may request additional blood tests depending on your symptoms and the possibility of bleeding or the need for treatment. These may include a full blood count to check for anaemia and blood group testing. Other tests may be required if a procedure or medication is being considered.
What happens during an ultrasound scan?
An ultrasound scan helps the healthcare team determine where the pregnancy is developing. A transvaginal ultrasound, also called an internal or vaginal scan, is commonly used because it provides detailed images of the uterus, ovaries, and surrounding structures in early pregnancy.
What is a transvaginal ultrasound like?
You will usually be asked to lie on an examination couch. A clinician or sonographer places a protective cover over a narrow ultrasound probe and gently inserts it into the vagina. The probe uses sound waves to produce images on a screen.
The procedure may feel uncomfortable, especially if you already have pelvic pain, but it should be explained to you beforehand. Tell the person performing the scan if you experience pain or need a pause. The scan does not involve ionising radiation.
A transabdominal ultrasound, in which a probe is moved over your abdomen, may also be used when additional views are needed. The clinical team will decide which approach is appropriate for your circumstances.
What does the ultrasound look for?
The sonographer or clinician examines the uterus to look for evidence of a pregnancy inside it. They may also assess the ovaries and fallopian tube areas for signs that a pregnancy could be developing outside the uterus. The scan may help identify fluid in the pelvis or abdomen that could be related to internal bleeding.
The Mayo Clinic's guidance on ectopic pregnancy diagnosis explains that transvaginal ultrasound is used to locate the pregnancy, while blood tests and other investigations may provide additional information.
Sometimes, the scan does not show the location of the pregnancy clearly. This can happen when the pregnancy is very early. An unclear scan does not automatically mean that an ectopic pregnancy is present, but it may mean that further tests and careful follow-up are necessary.
What if the pregnancy cannot be located?
If a pregnancy test is positive but the ultrasound does not show a pregnancy clearly inside or outside the uterus, clinicians may describe the situation as a pregnancy of unknown location. This is a temporary clinical classification rather than a final diagnosis.
There are several possible explanations, including an early pregnancy inside the uterus that is not yet visible, a pregnancy that is no longer developing, or an ectopic pregnancy. Further assessment is needed to determine which explanation fits the findings.
Your care team may arrange repeat hCG blood tests, another ultrasound scan, or both. The timing of follow-up depends on your symptoms, test results, and clinical assessment. You should receive clear instructions about when to return and what symptoms require immediate attention.
Do not assume that an inconclusive first scan means everything is normal or that an ectopic pregnancy has been confirmed. The results need to be interpreted together and followed up until the clinical team can establish an appropriate plan.
How long does an ectopic pregnancy assessment take?
The time required varies according to the tests you need, how busy the service is, and whether the results are available during your visit. A straightforward assessment may take a few hours, particularly when a blood test and ultrasound are both required. You may need to wait between tests or for a clinician to review the findings.
Some people need more than one visit because an early pregnancy cannot always be located immediately. Repeat blood tests may be scheduled over the following days, with further ultrasound imaging when appropriate.
If the team suspects a serious complication, assessment and treatment may happen much more quickly. In that situation, emergency care takes priority over completing a routine outpatient assessment.
What happens after the assessment?
Your next steps depend on the results of your examination, blood tests, ultrasound, and overall clinical condition. Before you leave, the healthcare team should explain what the findings mean, whether the diagnosis is clear, and what follow-up or treatment is needed.
If the pregnancy is located inside the uterus
If the scan identifies a pregnancy inside the uterus, the team will explain the findings and any further care that may be appropriate. If your symptoms or scan findings still need clarification, additional monitoring may be recommended.
If an ectopic pregnancy is confirmed or strongly suspected
The team will explain the available treatment options based on the location and development of the pregnancy, your symptoms, your clinical condition, and the investigation results. Treatment may involve medication or surgery. In selected circumstances, carefully supervised monitoring may be appropriate.
The team will also explain what follow-up is required. Depending on the treatment, this may include repeat blood tests to check that hCG levels fall as expected or further assessment to confirm that the pregnancy has resolved.
If the results remain uncertain
You may be given a follow-up plan that includes repeat blood tests and another scan. Make sure you understand when and where these appointments will take place and whom to contact if your symptoms change. Follow-up is important even if you feel well, because symptoms alone cannot establish where the pregnancy is developing.
When should you seek emergency medical help?
An ectopic pregnancy can cause internal bleeding if it ruptures. Seek emergency medical care immediately if you develop sudden or severe abdominal or pelvic pain, shoulder-tip pain, marked dizziness, fainting, or collapse, particularly if pregnancy is possible.
The NHS information on ectopic pregnancy highlights the importance of urgent assessment when concerning symptoms occur. Do not wait for a scheduled appointment or a repeat blood test if you develop emergency warning signs.
Prompt medical advice is also important if you may be pregnant and experience unusual vaginal bleeding or abdominal or pelvic pain, even if you have not received a positive pregnancy test. These symptoms can have different causes, and a healthcare professional can determine the appropriate assessment.
How can you prepare for your appointment?
You do not usually need extensive preparation for an ectopic pregnancy assessment. If you can do so without delaying urgent care, the following information may be helpful:
- The date your last menstrual period started, if you know it.
- Any pregnancy test results and the dates you took the tests.
- A brief description of when your symptoms began and how they have changed.
- A list of medicines you take and any relevant medical or pregnancy history.
- Details of previous blood tests or ultrasound scans, if available.
You may wish to ask how the test results will be communicated, whether you need another appointment, and which symptoms mean you should return immediately. If you are anxious, consider asking someone you trust to accompany you, provided this is practical and consistent with the service's arrangements.
The most important part of the assessment is establishing whether the pregnancy can be located safely and identifying any need for urgent care. If the first set of results is unclear, a structured follow-up plan helps the clinical team continue the assessment.