What it measures
Human chorionic gonadotrophin (hCG) is the hormone made by the placenta in pregnancy. The blood test measures the amount, so it can pick up pregnancy earlier than most urine tests and show how the level changes over time.
Why people test it
- Used to confirm pregnancy and give an exact hCG level.
- Repeated about 48 hours apart to see how hCG is rising in early pregnancy.
- Checked when an ectopic pregnancy or miscarriage is suspected.
- Used as a tumour marker for some testicular cancers and other rare tumours.
Typical range
Ranges and cut-offs vary by lab and method. In pregnancy, levels rise quickly and vary widely between people, so a single result is read alongside the stage of pregnancy. Your report shows the lab's own cut-off for a positive result.
Finger-prick or vein?
A vein sample is usually advised, as most labs measure the exact amount of hCG on a tube of serum from a vein.