Hemolysis does not usually occur in fetuses born to mothers with AB blood type and fathers with O blood type and is not a cause for concern. Common hemolysis includes ABO hemolysis and Rh hemolysis.
1. ABO hemolysis: it mostly occurs when the mother has type O blood and the fetus has type A or B blood, and the father may have type A, B or AB. If the mother has AB blood type or the baby has O blood type, ABO hemolytic disease will not occur.
2. Rh hemolysis: usually does not occur in the first child. It is mostly seen in Rh-negative mother’s first pregnancy and the fetus is Rh-positive. If there is another pregnancy, it may cause fetal hemolysis.
If the mother is O-type blood and the father is AB-type blood, the blood type of the mother and child should be checked in time, and if hemolysis occurs, treatment should be carried out under the guidance of the doctor.