Haemoglobin and blood group (Hb, blood group)
Quick answer: This combined test measures haemoglobin and finds your ABO and Rh blood group. It is often done early in pregnancy or before a procedure.
- SampleBlood
- TakesAbout 5 minutes
- Before the testNo special preparation is usually needed.
- In fertility careBoth results are routine at the first antenatal visit, to check for anaemia and Rh-negative blood group.
How the test is done
- 1A single blood sample is taken from a vein or finger
- 2Part of the sample is used to measure haemoglobin
- 3Another part is mixed with anti-A, anti-B and anti-D reagents
- 4Your haemoglobin level and blood group are reported together
What your results can mean
Reading your report
Haemoglobin ranges differ by sex and in pregnancy; discuss the results with your doctor.
If the result is outside the usual range
Low haemoglobin can point to anaemia, while the blood group is a fixed result rather than normal or abnormal. An Rh-negative result matters for pregnancy planning.
Who usually has this test
Pregnant women at the first visit, people before minor procedures, and blood donors.
Risks and aftercare
A small bruise or tender fingertip is possible; keep a note of your blood group for future use.
Names and options
Also called: Hb and blood group
Listed by the hospital as
- HB, BLOOD GROUP
Questions about this test
Why are these two tests combined?
Both are basic checks often needed before pregnancy care or procedures. Doing them together saves a separate visit.
Do I need to fast for an Hb and blood group test?
No fasting is usually needed for either test. Follow any instructions the hospital gives.
What should I do if I am Rh negative?
Tell your doctor, especially if you are pregnant or planning to be. You may need an indirect Coombs test and anti-D injections.
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.