For ABO hemolysis, there is no uniform standard for monitoring and treatment. Some scholars suggest that the test can be done once before pregnancy, the second time at 16 weeks of pregnancy, the third time at 28 weeks of pregnancy, and the test is repeated every 2 weeks thereafter, and the majority of pregnant women can produce the antibody after 28 weeks, and the test is performed once a week after the 8th month of pregnancy. If you are preparing for pregnancy, you can use the blood type of the man and the woman to initially determine whether the fetus has the possibility of ABO hemolysis. If the mother’s blood type is O and the father’s blood type is A, B or AB, the resulting fetus may develop neonatal hemolytic disease, which is prone to anemia or hypoxia. However, not all women with blood type O and men with blood type A, B or AB will develop hemolytic disease of the newborn, so there is no need to be overly nervous. If you wish, you can check your blood for antibodies. If the antibodies are low in potency, you may be able to conceive without worrying. If the antibody level is high, it can be lowered by oral medication, but the efficacy of the current medication is not very satisfactory. In addition, ultrasound examination can also help to detect fetal hemolysis. When the fetus is found to have edema of the skin, pleural and abdominal effusion, enlarged liver and spleen, or an enlarged placenta, it should be considered whether there is the possibility of maternal-fetal blood group incompatibility. During pregnancy, you need to actively cooperate with the examination, and after the birth of the fetus, you can leave the umbilical cord blood to detect whether there is hemolytic disease of the newborn, so that timely diagnosis and treatment can be made. ABO hemolysis may occur in newborns, but the chance of occurrence is not high. Therefore, you need to maintain a happy mood during pregnancy to avoid excessive anxiety and tension, which may affect your own health and the health of the fetus. Ensure a balanced diet and avoid oily and stimulating foods. Regular pregnancy checkups and relevant treatments should be carried out when necessary.