What blood types cannot have children together?

Blood types do not prevent individuals from having children together; however, certain combinations can lead to complications during pregnancy. The primary concern arises with the Rh factor, particularly when an Rh-negative mother has a child with an Rh-positive father, which can result in Rh incompatibility. This situation may lead to health issues for the baby, such as hemolytic disease of the newborn. It's important for expectant parents to consult with healthcare providers to assess any potential risks related to blood types.