Can blood type change?

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Dr Anshul Maheshwari

General Practitioner

MBBS
5+ Yrs

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No

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Answered 04/07/2025

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Blood type is generally stable throughout a person's life because it is determined by genetics. However, there are very rare situations where blood type might appear to change, such as after certain medical treatments like bone marrow transplants or in some diseases affecting the blood cells.

Key points to understand:

Blood type is inherited: Your blood type (A, B, AB, or O, along with Rh factor) is set by your parents' genes.
Usually permanent: For most people, blood type does not change over time.
Rare exceptions: In cases like bone marrow or stem cell transplants, the donor's blood type can replace the recipient's, effectively changing it.
Medical conditions: Some rare blood disorders or cancers can alter blood cell characteristics, which might affect blood typing tests.

If you have concerns about your blood type or need testing, it's best to consult your healthcare provider for accurate information and guidance.

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