What is an AFP test?
AFP (alpha-fetoprotein) is a protein produced in large amounts by the foetal liver and yolk sac during pregnancy. After birth, production switches off almost completely, so healthy non-pregnant adults have only tiny amounts in their blood, measured in nanograms per millilitre (ng/mL).
In adult medicine, AFP is used in two very different settings. In oncology, it helps monitor liver cancer (hepatocellular carcinoma) and certain germ cell tumours of the ovary or testis. In obstetrics, maternal blood AFP is part of antenatal screening, where an unexpected level for the week of pregnancy prompts a closer look with ultrasound. In neither setting does AFP alone make a diagnosis.
AFP normal range
| Group | Typical range | Interpretation |
|---|---|---|
| Healthy adults (non-pregnant) | Below 10 ng/mL | Usual cutoff (some labs use 20) |
| Mildly raised | 10–100 ng/mL | Often benign liver causes; investigate |
| Markedly raised | Above 400 ng/mL | Strongly associated with liver cancer in context |
| Pregnancy | Varies by week | Compared against week-specific charts |
Cutoffs differ slightly between laboratories, so always read your value against the range printed on your own report. In pregnancy, the result is only meaningful against the expected level for that exact week.
What a high AFP can mean (and what it can’t)
A raised AFP means the protein is higher than expected for your situation. In adults who are not pregnant, the cancers most linked with high AFP are hepatocellular carcinoma (liver cancer) and non-seminomatous germ cell tumours. Very high values, typically above 400 ng/mL in the right clinical setting, carry more weight than mild elevations.
But benign causes are common and must be ruled out first. Chronic hepatitis B or C, cirrhosis, and other chronic liver diseases frequently raise AFP into the tens or low hundreds. Pregnancy raises it substantially as a normal part of foetal development. This is why a raised AFP leads to imaging and clinical review, not straight to a cancer label.
AFP is also a surveillance tool: people with cirrhosis or chronic hepatitis B are often tested every six months alongside a liver ultrasound, because catching liver cancer early changes outcomes. A rising trend on surveillance matters far more than any single value.
AFP vs other tumour markers
| Marker | Most linked with | Main use | Key limitation |
|---|---|---|---|
| AFP | Liver cancer, germ cell tumours | Liver cancer surveillance and monitoring; pregnancy screening | Rises in hepatitis, cirrhosis and pregnancy |
| CEA | Colorectal cancer | Monitoring treatment and recurrence | Rises with smoking and liver disease |
| CA-125 | Ovarian cancer | Monitoring ovarian cancer | Rises in endometriosis and menstruation |
| CA 19-9 | Pancreatic cancer | Monitoring pancreatic and biliary cancers | Rises in bile duct blockage; some people cannot make it |
| PSA | Prostate cancer | Prostate screening and monitoring | Rises in benign prostate enlargement |
Each marker answers a different question, and none diagnoses cancer alone.
Reading your report: what your doctor actually looks at
- Are you pregnant? Pregnancy changes everything about AFP interpretation; the result is read against week-specific expected levels.
- How high is it? Mild elevations (tens) most often reflect liver inflammation; values in the hundreds raise stronger suspicion in the right setting.
- What is the trend? On surveillance, a steadily climbing AFP matters more than a one-off mildly raised value.
- What do the liver tests show? AFP is read alongside liver function tests and hepatitis status, never in isolation.
- What does imaging show? A raised AFP usually leads to a liver ultrasound or CT; the scan, not the blood test, answers the question.
A mildly raised AFP with chronic liver disease is common and usually watched rather than acted on urgently. Discuss the full picture with your doctor.
AFP test price in India
AFP is a specialised immunoassay and typically falls in the ₹800–₹1,500 band in India, though prices vary by city and lab. Home collection can add a small fee.
For surveillance (for example, six-monthly testing in cirrhosis), using the same laboratory each time keeps the trend comparable, since different analysers can read slightly differently. Where possible, choose a NABL-accredited lab.
Questions to ask your doctor
- Why was AFP ordered for me: cancer surveillance, or pregnancy screening?
- How does my hepatitis or liver status affect this result?
- When should we repeat it, and do I need imaging?
- Should repeat tests be done at the same lab?
Frequently Asked Questions
What is the full form of AFP?
AFP stands for alpha-fetoprotein. It is a protein made by the liver and yolk sac during foetal development; in adults, only tiny amounts are normally present in blood.
Do I need to fast for an AFP test?
No. The AFP test does not require fasting and can be taken at any time of day.
Can AFP be high without cancer?
Yes. Chronic hepatitis and cirrhosis are common benign causes of a raised AFP. Pregnancy also raises it markedly, which is normal. A raised AFP prompts further investigation, usually imaging, rather than giving a diagnosis by itself.
Why is AFP tested in pregnancy?
AFP crosses into the mother’s blood during pregnancy, so a maternal blood AFP (part of antenatal screening) that is higher or lower than expected for the week of pregnancy can flag the need for a closer look, such as a detailed ultrasound. It is a screening step, not a diagnosis.
My AFP is 12 ng/mL. Should I worry?
A mildly raised AFP just above the cutoff is often benign, especially with liver inflammation. Doctors usually repeat the test and check liver imaging and liver function before drawing conclusions. Discuss it with your doctor rather than interpreting one value alone.
How much does the AFP test cost in India?
The AFP test typically costs in the ₹800–₹1,500 band in India, though prices vary by city and lab. Choose a NABL-accredited lab where possible, and remember the reference range printed on your own report is the one that counts.
Pharmacist's practical notes
Context is everything with AFP. The same number means something completely different in a pregnant woman, a person with cirrhosis on surveillance, and someone with no liver disease at all. When you get the result, the first check is always: which of these situations applies to me, and was the test read against the right reference?
If you have chronic hepatitis B or C or cirrhosis, six-monthly AFP plus ultrasound is a well-established surveillance routine, so a mildly raised AFP on one round is usually just watched. Do not skip surveillance rounds because one result was normal; the programme works through repetition, not single tests.
Several medicines and herbal products can injure the liver and muddy AFP interpretation, so tell your doctor about everything you take, including over-the-counter and traditional remedies. Never stop a prescribed medicine because of a blood result without medical advice.
As with all tumour markers, use the same laboratory for repeat AFP tests. Assay differences between manufacturers can fake a trend where none exists, and a false rise causes real distress. If a result surprises you, discuss it with your doctor before repeating the test.
In India
Indian labs report AFP in ng/mL, the same unit used internationally. With high rates of chronic hepatitis B in the country, AFP surveillance in liver disease is a common and sensible use of this test; the typical price band is ₹800–₹1,500, varying by city and lab.
Where possible, choose a NABL-accredited lab. Reference ranges can differ slightly depending on the analyser a lab uses, so the range printed on your own report is the one that counts, not a number from a website. Discuss the result with your doctor rather than interpreting it alone.
References
Sources cited on this page.
- StatPearls: Alpha-Fetoprotein. NCBI Bookshelf, peer-reviewed clinical summary.
- American Cancer Society: Tumor Markers. Patient guide to how tumour markers are used.
- National Cancer Institute: NCI Dictionary of Cancer Terms, entry for alpha-fetoprotein.