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Understand Human Chorionic Gonadotropin (hCG)

Human Chorionic Gonadotropin (hCG)

Hormone markers

What the test generally measures, and what to ask about it.

Longetic keeps every lab and record you’ve had organized and easy to find, so your own Human Chorionic Gonadotropin (hCG) values sit together on one chart and you walk into your next appointment prepared.

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Updated Jul 13, 2026

What is Human Chorionic Gonadotropin (hCG)?

A hormone produced mainly during pregnancy, which can also act as a marker for certain tumors.

Human chorionic gonadotropin is made by the placenta in pregnancy, which is why pregnancy tests look for it, and a quantitative blood test can track how it rises early on. Outside of pregnancy, higher levels can be associated with certain tumors of the reproductive organs or, rarely, other cancers, so it can be used as a tumor marker in specific situations. In people who are not pregnant, levels are normally very low or undetectable, and results are always read in the context of why the test was ordered.

This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Terms of Use.

References

Clinical "HCG blood test - quantitative" MedlinePlus. medlineplus.gov/ency/article/003510.htm. Accessed Aug 24, 2026.

About our sources

Clinical / professional

Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.

Peer-reviewed research

Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.

History of updates

Published · Jul 13, 2026
First published, written and independently fact-checked against the cited sources.

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