Free beta hCG blood test
Quick answer: This test measures the free beta part of hCG, a pregnancy hormone made by the placenta. It is used in first-trimester screening, with PAPP-A and the NT scan, to estimate the chance of chromosomal conditions in the baby.
- SampleBlood
- TakesAbout 5 minutes
- Before the testNo special preparation is usually needed.
- In fertility careFree beta hCG is part of screening in early pregnancy and gives a risk figure, not a diagnosis.
How the test is done
- 1You share your dating scan so the exact week is known
- 2The skin over a vein is cleaned
- 3A needle draws blood into a tube
- 4The result is combined with PAPP-A and the NT scan
What your results can mean
Reading your report
The result is read against the exact week of pregnancy, so discuss it with your doctor.
If the result is outside the usual range
A high level can be seen with a higher chance of Down syndrome, and a low level with a higher chance of some other chromosomal conditions. Twins or a wrong date can also change it, and the result gives a chance, not a diagnosis.
Who usually has this test
Pregnant women between about 11 and 14 weeks who choose first-trimester screening.
Risks and aftercare
There is no risk to the pregnancy from this blood test.
Names and options
Also called: free beta hCG, free b-hCG
Listed by the hospital as
- FREE BETA HCG, SERUM
Questions about this test
How is free beta hCG different from a beta hCG pregnancy test?
A beta hCG test measures total hCG to confirm and follow pregnancy. Free beta hCG measures one part of it and is used in screening for chromosomal conditions.
Does an IVF pregnancy change the result?
IVF, donor eggs and twins can affect marker levels. Tell the lab about these so your chance is calculated correctly.
What should I do after a high-chance result?
Your doctor will explain the next options, which may include cell-free DNA testing or a diagnostic test such as CVS.
Related tests
Tamara Hospital & IVF Centre, Rajajinagar
34/3, 10th Cross Road, opp. Vardhaka Sardar Patel School, 1st N Block, 2nd Stage, Rajajinagar, Bengaluru 560010
The hospital is open 24 hours. Call before you come to check the timing for your scan or sample collection.
Get directions ↗IVF Pulse fertility care at Tamara Hospital →
Reception
Waiting area
IVF lab
This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.