A member asked:

If a baby with b+ blood has a mom with o- blood. what could the dad's blood type be?

4 doctors weighed in across 2 answers

Rh positive: Dad could be b+ or ab +.

Answered 8/16/2013

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Dr. Richard Pollard answered

Specializes in Anesthesiology

B : The father has to have a blood type of b.

Answered 6/19/2017

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