Reviewed: 13. Juli 2026
CA 125 Cancer Antigen 125 (CA 125)
Unit: U/ml
Quick Explanation
CA 125 is mainly measured in connection with the ovaries, but also rises with many benign conditions like endometriosis, menstruation, or ovarian cysts. An elevated value alone is not a cancer diagnosis and is always assessed together with imaging and symptoms.
📊 Reference Values
ℹ️ Reference ranges may vary slightly between laboratories. Always compare your value with the reference range from your own lab report.
🔍 Possible Causes
Value too high — possible causes
- ·Endometriosis
- ·Ovarian cysts
- ·Menstruation
- ·Pelvic inflammation
- ·Ovarian cancer (one of several possible causes)
This list shows possible causes — not a diagnosis. Only your doctor can correctly interpret your result.
🩺 Questions for Your Doctor
- →Which benign causes apply to me?
- →Is a gynecological ultrasound useful?
Have a complete lab report?
Medyra explains your entire lab report in plain language and prepares questions for your doctor appointment — free, in your language, in under 60 seconds.
Start for free →Medical Disclaimer
The content on this page is for general information only and does not replace professional medical advice, diagnosis, or treatment. Always consult your doctor or pharmacist for health-related questions. Lab values should always be assessed in the context of your personal medical history.