What is a Blood Group & Rh Typing Test?
The Blood Group and Rh Typing test is a fundamental diagnostic procedure used to determine an individual's ABO blood type (A, B, AB or O) and their Rh factor (Positive or Negative). This gives you your complete blood group — for example A+, O–, AB+ or B+. Knowing your blood group is essential for safe blood transfusions, surgical preparation, emergency medical care and pregnancy monitoring. It is one of the most important pieces of personal health information you should have on record.
Understanding ABO Blood Groups
The ABO blood group system classifies blood into four types based on the presence or absence of A and B antigens on the surface of red blood cells and corresponding antibodies in the plasma:
| Blood Group | Antigens on RBC | Antibodies in Plasma | Can Receive From | Can Donate To |
|---|---|---|---|---|
| A | A antigen | Anti-B | A, O | A, AB |
| B | B antigen | Anti-A | B, O | B, AB |
| AB | A and B antigens | None | A, B, AB, O (Universal Recipient) | AB only |
| O | None | Anti-A and Anti-B | O only | A, B, AB, O (Universal Donor) |
Understanding the Rh Factor
The Rh factor (Rhesus factor) is determined by the presence or absence of the D antigen on the surface of red blood cells:
- Rh Positive (Rh+) — the D antigen is present on red cells. About 93–95% of Indians are Rh positive. Rh+ individuals can safely receive both Rh+ and Rh– blood.
- Rh Negative (Rh–) — the D antigen is absent. Only 5–7% of Indians are Rh negative. Rh– individuals must only receive Rh– blood to avoid a dangerous immune reaction called haemolytic transfusion reaction.
Why is Rh Typing Critical in Pregnancy?
- If an Rh– mother carries an Rh+ baby (inherited from the father), small amounts of the baby's Rh+ blood can enter the mother's circulation during delivery, causing the mother to produce anti-Rh antibodies.
- In a subsequent pregnancy these maternal antibodies can cross the placenta and attack the Rh+ red cells of the next baby, causing Haemolytic Disease of the Fetus and Newborn (HDFN) — a serious condition causing severe anaemia, jaundice and in severe cases hydrops fetalis or stillbirth.
- Prevention — Rh– mothers are given anti-D immunoglobulin (RhoGAM injection) during pregnancy and after delivery to prevent sensitisation. This is why blood group testing in the first trimester is mandatory for all pregnant women.
- Rh typing is also critical after miscarriage, ectopic pregnancy or any invasive obstetric procedure in Rh– women.
Blood Group Frequency in India
| Blood Group | Approximate Frequency in India |
|---|---|
| B+ | 38% — most common |
| O+ | 32% |
| A+ | 22% |
| AB+ | 7% |
| B– | 2% |
| O– | 2% |
| A– | 1% |
| AB– | 0.5% — rarest |
AB– is the rarest blood group in India. O– is the universal donor and is the most critical group to maintain in blood banks for emergency use.
When is a Blood Group & Rh Typing Test Required?
Blood group testing is required in many situations:
- Pre-surgical and pre-operative preparation
- First antenatal visit — mandatory for all pregnant women
- Before blood transfusion or platelet transfusion
- Blood or organ donation eligibility
- Emergency preparedness and personal medical records
- Pre-marital health check to assess Rh compatibility
- New-born screening for ABO and Rh compatibility (when mother is Rh–)
- Pre-employment medical documentation
- School, college and sports medical certificates
- Visa and immigration medical examinations
Blood Group & Rh Typing Test Price in Kolkata
No fasting required | Permanent blood group card provided | Same-day results | Free home collection above ₹2,000
Tests Commonly Ordered Alongside Blood Group & Rh Typing
- CBC (Complete Blood Count) — blood group is always ordered alongside CBC in pre-operative and antenatal panels
- Cross-matching — before a blood transfusion, the donor and recipient blood are cross-matched alongside the ABO and Rh typing to ensure compatibility
- Indirect Coombs Test (ICT) — checks for anti-Rh antibodies in Rh– pregnant women to detect early sensitisation
- Direct Coombs Test (DCT) — checks for antibodies already attached to red cells in newborns with suspected HDFN
- HbsAg (Hepatitis B) & HIV screening — mandatory for blood donors alongside blood group testing
- Antenatal panel — blood group, CBC, HbsAg, VDRL and blood sugar in the first trimester
Home Collection for Blood Group & Rh Typing in Kolkata
Apollo Diagnostics provides home blood sample collection for Blood Group and Rh Typing tests across Nagerbazar, Dum Dum, South Dum Dum and surrounding North and Central Kolkata areas. No fasting is required. A blood group report card is issued alongside the digital report.
- Home collection available: 7:00 AM – 2:30 PM Daily
- No fasting required — book any time
- Permanent blood group card provided
- Free home collection on orders above ₹2,000
- Same-day digital reports delivered to WhatsApp
→ Apollo Diagnostics Nagerbazar → Full List of Individual Tests → Book Home Collection → Full Body Checkup Packages
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