O-negative husband and B-positive wife, what blood type will their child be?

Patient's question:

I am blood type B, my husband is blood type O. What blood type will our child have?

Doctor's answer:

Analysis of the condition: Hello, your mother is type B blood, and your father is type O blood. Therefore, the blood types of the next generation could be either type B or type O. It is not possible for them to be type A or type AB.
Advice: This situation will not cause neonatal hemolytic disease. Only when the mother is type O blood and the father is type AB blood, and the fetus is type AB blood, there is a possibility of neonatal hemolytic disease. This is because type O mothers contain anti-AB antibodies, while the fetus is type AB and contains AB antigens. If the anti-AB antibodies in the mother's blood enter the fetus and bind to the fetus's AB antigens, it may lead to neonatal hemolytic disease. However, the probability of this occurring is very low.

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