CA 125
Clinical Biochemistry
Sample and container requirements
Serum Lithium Heparin Plasma (paediatrics only)
Minimum volume required
Special requirements
None
Patient preparation
None
Sample viability
Turnaround time
This assay is run throughout the day and night. The in-lab turnaround time is normally less than 24 hours.
Reference range
<35 kU/L (Source: Roche Diagnostics)
Clinical guidance
CA 125 is used primarily as a marker for cancer of the ovary. Please refer to LabTestsOnlineUK to learn more about CA125. https://labtestsonline.org.uk/tests/cancer-antigen-125-ca125-test
Notes
CA 125 should not be used as a cancer screening test.
Images to go here
This information was last updated on 19 August 2026