A member asked:

My father has o positive blood mother has o positive rhfactor blood child was born with b positive blood how is this possible?

A doctor has provided 1 answer

Not possible: The o blood type is oo genotype. In other words, each parent contributes an o. It is not possible for an o man and an o woman to have anything but an o baby.

Answered 4/20/2014

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A member asked:

If father's blood is a and mother is o, can a child be b?

11 doctors weighed in across 2 answers