A 47-year-old member asked:
is it possible for an a negative blood father and a b positive mother to have an o negative child?
1 doctor answer • 2 doctors weighed in
Emergency Medicine 24 years experience
Yes: There are two "positions" in the blood type (like ab blood), if father ao and mother bo, then could see a, b, ab, or o as blood type. Rh factor is either transmitted or not--so mom might not transmit. Seek dna testing if want to know for sure.
5.3k viewsReviewed >2 years ago
Last updated Feb 1, 2013
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