Hemolytic disease of the newborn, caused by an immune reaction, when maternal antibodies cross the placenta, attach to red blood cells in the fetal circulation, break down and destroy the red blood cells (known as hemolysis).

Blood types are classified according to the presence or absence of certain antigens that can trigger an immune response when they are outside your body. These antigens can cause the patient's immune system to attack when they are transfused. So what are the characteristics of blood type O and what antibodies do people with blood type O have? Read the article below to learn more about this blood type.