CA-125 Test
A protein elevated in many ovarian cancers. Also rises with benign conditions like endometriosis or menstruation.
What is CA-125?
A protein elevated in many ovarian cancers. Also rises with benign conditions like endometriosis or menstruation.
CA-125 Reference Range
These are the typical adult reference ranges used by major US labs. Your report will include the specific range used by the lab that processed your sample.
| Population | Range |
|---|---|
| age 18+ | 0.000 – 35.0 U/mL |
Reference ranges are educational. Always interpret your result with the specific range printed on your lab report and discuss anything outside the range with a clinician.
What your CA-125 result may mean
Most often monitored in known ovarian cancer. Many benign causes — interpretation requires clinical context.
Educational only — not a diagnosis. Many factors can influence a single result. Discuss anything that concerns you with a healthcare provider.
Sources
Related Heart Health biomarkers
Markers commonly tested alongside CA-125.
Frequently asked
No. TestWell's licensed physician network reviews and approves your order — usually within minutes. You can place an order online without an in-person visit or a referral from your own doctor.
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