Can hemolysis occur if both parents have type A blood?

When both parents have blood type A, the risk of ABO incompatibility hemolytic disease in the newborn is theoretically low. ABO hemolytic disease mainly occurs when the mother has blood type O and the fetus has blood type A or B. This is because mothers with blood type O may produce antibodies against A or B antigens, which can cross the placenta and enter the fetal circulation, triggering a hemolytic reaction. When both parents have blood type A, the fetus can only have blood type A or O. If the fetus has blood type A, which is the same as the mother's, ABO hemolytic disease will not occur. If the fetus has blood type O, since O blood type does not contain A or B antigens, no hemolytic reaction will be triggered either. In addition to ABO hemolytic disease, other types of hemolytic diseases, such as Rh hemolytic disease, can also occur, and these are related to whether the parents' Rh blood types are compatible. Therefore, although the risk of ABO hemolytic disease is low when both parents have blood type A, other potential risk factors for hemolytic diseases should still be monitored, and necessary blood typing and prenatal examinations should be performed during pregnancy.