Identical groups in a couple are medically harmless, children inherit straightforwardly, and pregnancy risks are lower, not higher. ## The honest answer Two O+ parents make O+ (or O−) children with no incompatibility possible. ABO problems arise only between mother and baby of DIFFERENT groups, and even those are usually mild. The taboo comes from confusing transfusion matching with genetics. Transfusion matching is about donated blood; marriage is about people. ## If this is your moment Blood cannot wait for curiosity to settle, patients wait in hours, not weeks. If you are healthy and between 18 and 65, register as a donor (two minutes, phone OTP) and let the system call you only when someone near you actually needs your group. Related: blood group matching for marriage · blood groups genetics
Blood groups
Same blood group marriage: problems, myths and facts
Identical groups in a couple are medically harmless, children inherit straightforwardly, and pregnancy risks are lower, not higher.
People also ask
Is same blood group marriage good or bad?
Medically neutral to slightly favourable, no incompatibility is possible between identical groups.
What problems can same blood group couples' children have?
None blood-related; inheritance is straightforward.
Why do people say same group shouldn't marry?
Confusion between transfusion rules and genetics, spread by social media.
About this article
Written by Assam Blood Donor team. Medical review: pending, content follows published national (NBTC/NACO) guidance and is for general education, not personal medical advice. Last updated 11 Sept 2026.
Sources: NBTC donor selection criteria · standard donation-centre practice
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