If the parents have A-type blood and B-type blood, or A-type blood and O-type blood, they will both have A-type blood children.

Blood type generally has a certain genetic nature, and the blood type of the parents directly determines the blood type of the child, mainly affected by the genetic inheritance factors of the parents. Usually, if both parents have B-type blood and A-type blood, their children will have B-type blood. In addition, if the parents have A-type blood and O-type blood, there is also a possibility that their children will have B-type blood.

There are many types of blood types, mainly including A-type blood, B-type blood, O-type blood, and AB-type blood, etc. As long as the blood type is healthy, there is usually no need for special treatment or intervention.