Human Chorionic Gonadotropin (HCG) in Serum or Plasma

What Is HCG Used For?

HCG is primarily used to confirm pregnancy, especially in early stages when other tests may not be as reliable. It can also help monitor the health of the pregnancy, detect ectopic pregnancies, or identify conditions like gestational trophoblastic disease. Additionally, HCG levels may be checked in cases of suspected ovarian or testicular tumors.

When Might You Need This Test?

You may need an HCG test if you suspect you are pregnant, especially if you have missed a menstrual period. Doctors may also order it during pregnancy monitoring, after a miscarriage or ectopic pregnancy, or if you have symptoms like unusual vaginal bleeding or pelvic pain. Certain cancers, particularly those producing HCG, may also require this test.

How Is the Test Performed?

A blood sample is taken from a vein in your arm. The sample is then sent to a lab for analysis. The test measures the amount of HCG hormone in your blood, which can be detected as early as 6–10 days after conception.

What Are Common Results?

Results are typically reported in international units per liter (IU/L). Low or undetectable levels may indicate no pregnancy or other medical conditions. Elevated levels can suggest pregnancy or certain tumors. Your healthcare provider will interpret the results in the context of your medical history and symptoms.