CA-125 (Ovarian Cancer)
CA-125 is a glycoprotein expressed by many ovarian cancers and is used to monitor treatment response and detect recurrence. It is not reliable for general screening because it is elevated in benign conditions such as endometriosis, fibroids, pelvic inflammatory disease, and menstruation, and is also a nonspecific marker in some other cancers. Trends over time carry more weight than single values.
Optimal range: who says what
No institution or named practitioner we track states an optimal target for CA-125 (Ovarian Cancer). How we verify ranges.
- No stated targetNo separate optimal establishedMonitoring marker; interpret against the lab's cutoff. Benign conditions (endometriosis, fibroids, menstruation) commonly elevate it
- Lab reference interval<35 U/mL (MedlinePlus)What a lab report flags against. A lab interval is not an optimal target.
2 providers include this
Cancer Screening Markers
Why CA-125 (Ovarian Cancer) matters
Elevated in ovarian cancer but also in benign conditions like endometriosis, fibroids, and menstruation. Used for monitoring treatment response rather than screening.
Which Providers Test CA-125 (Ovarian Cancer)?
Cheapest: Mito Health at $297/year. Most comprehensive: Function Health, 160+ biomarkers for $365/year.
2 panels that include it, cheapest first
| Provider | Annual Cost | Total Biomarkers | $/Biomarker |
|---|---|---|---|
| $297 | 100+ | $2.97 | |
 Function Health | $365 | 160+ | $2.28 |
$/Biomarker is annual cost divided by the panel's advertised biomarker count, not the price of this one test. We track 23 blood test providers (32 plans); 21 of those plans are itemized marker by marker. Compare all of them.
19 itemized panels do not include CA-125 (Ovarian Cancer)
Superpower · WHOOP Advanced Labs · Labcorp OnDemand · Life Extension Elite · Everlywell · InsideTracker · Marek Health Base · Marek Health Comprehensive · Marek Health Complete · Marek Health Executive · Blueprint · Empirical Health · Oura Health Panels · SiPhox Health · Hims Labs · Healthspan · Vitality Blueprint Standard · Vitality Blueprint Elite · Ultrahuman Blood Vision Annual
11 providers not itemized in our matrix
We have not itemized these marker by marker (some sell tests one at a time), so this page cannot say whether they offer CA-125 (Ovarian Cancer). Check with them directly.
Life Extension Standard · Quest Health · Ultrahuman Blood Vision · Lifeforce · Hundred Health · Personalabs · Walk-In Lab · HealthLabs · WHOOP Specialized Panels · Marek Health Essential · Vitality Blueprint Upload
Frequently Asked Questions
What is the optimal range for CA-125 (Ovarian Cancer)?
No separate optimal established: Monitoring marker; interpret against the lab's cutoff. Benign conditions (endometriosis, fibroids, menstruation) commonly elevate it. Lab reference interval: <35 U/mL (MedlinePlus). That is what a lab report flags against, not an optimal target.
Which blood test providers include CA-125 (Ovarian Cancer)?
2 of the 21 blood testing panels we itemize marker by marker include CA-125 (Ovarian Cancer) in their panels. This biomarker has limited availability.
Medical Disclaimer
This information is for educational purposes only and is not medical advice. Always consult with a qualified healthcare provider about your specific health needs.
Last reviewed Sep 23, 2026 · First published Sep 30, 2025