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 reliable. It can also help monitor high-risk pregnancies or diagnose conditions like molar pregnancy or gestational trophoblastic disease. Doctors may also use it to check for ectopic pregnancies or to evaluate fertility treatments.

When Might You Need This Test?

You might need an HCG test if you have missed periods, suspect pregnancy, or experience symptoms like nausea, breast tenderness, or unusual vaginal bleeding. It’s also used during fertility treatments, after miscarriage, or in cases where pregnancy complications are suspected.

How Is the Test Performed?

A blood sample is taken from a vein in your arm. The sample is sent to a lab where HCG levels are measured using a sensitive immunoassay method. The test is quick and usually done in a doctor’s office or clinic.

What Are Common Results?

Results are reported in international units per milliliter (IU/mL). Very low or undetectable levels may mean no pregnancy. Rising levels over time can confirm pregnancy progression. Very high levels may indicate complications like molar pregnancy.