Results:  2-3 business days.

Also known as: CA 125, CA 125, Second Generation Assay.

The test for cancer antigen 125 (CA-125) is used for men and women, but mostly for women to:

• Check to see if treatment for cancer is working. If the level of CA-125 is decreasing, it usually means that the treatment is working.
• Check to see if ovarian cancer has reoccured.
• Check for pelvic cancer or other cancers.
• Check to see if the ovary is the main site of cancer in a female. If a doctor has found a cancer that has spread to another part of the body (metastatic cancer), they may do a CA-125 test to find out where the cancer started. High levels of CA-125 are a sign that the cancer started in the ovary, but other types of cancer can increase CA-125 levels as well.