MedlinePlus.gov on X: "What is a CA-125 blood test? This test measures the amount of a protein called CA-125 (cancer antigen 125) in a sample of your blood. High levels of CA-125 are often found in people who have ovarian cancer. Learn more: https://t.co/gBFvnhKXoK"

MedlinePlus.gov

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What is a CA-125 blood test? This test measures the amount of a protein called CA-125 (cancer antigen 125) in a sample of your blood. High levels of CA-125 are often found in people who have ovarian cancer. Learn more: ow.ly/QmnY50Vu9vf

2:02 PM · Apr 4, 2025·

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