Early symptoms of hemolytic disease
ABO hemolysis is caused by the wrong ABO blood group of mother and child. Due to the wrong ABO blood group of mother and child, it is called "ABO hemolytic anemia in children less than 1 year old", which is homologous immune hemolysis. During pregnancy or delivery, a large number of fetal red blood cells can be added to the mother. If they are incompatible with each other's blood group, the mother lacks the antigen of fetal red blood cells, and the mother will produce relevant antibodies.