A member asked:

Is it possible to have child with rh negative blood if both parents have blood rh positive?

A doctor has provided 1 answer

Yes: The rh factor is determined from both parents. Each parent contributes one half of the infant's rh type. Each parent has 2 rh genes. So, if each parent (of the child in question) has a "split" rh:(-)/(+), i.e. Half negative and half positive--they are reported as "positive". Yet if each parent contributes the "blank" or rh negative portion to baby then he is (-)/(-) or rh negative!

Answered 4/30/2015

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