Human Chorionic Gonadotropin (HCG) in Serum or Plasma

Why Is This Test Done?

Your healthcare provider may order an HCG test to confirm pregnancy, monitor its progress, or check for conditions like ectopic pregnancy, molar pregnancy, or certain cancers (e.g., testicular or ovarian). It’s often used in early pregnancy screening or during follow-up for fertility treatments.

How Is the Sample Collected?

A blood sample is taken from a vein in your arm. You may feel a small pinch, but it usually doesn’t cause significant discomfort. If you’re pregnant, you might also consider a urine test for HCG, which is less invasive but less precise.

What Does the Result Mean?

Results can vary widely depending on the stage of pregnancy or condition being tested. A positive result in early pregnancy typically appears within 7–10 days after conception. Non-pregnancy conditions may show elevated levels differently, so results should always be interpreted by your provider.

What Are Common Causes of Abnormal Results?

HCG levels can be higher than expected in pregnancy, but they may also rise in conditions like gestational trophoblastic disease (a rare pregnancy complication), certain cancers, or medical treatments that stimulate hormone production. Lower-than-expected levels can indicate early miscarriage, failed implantation, or other issues.