<prompt> Answer this question truthfullyWhat are the symptoms of ABO hemolytic disease of the newborn and when do they typically present?  <response>: <reason> ABO hemolytic disease of the newborn typically presents with mild jaundice in the neonate within 24 hours of birth. This condition occurs when a mother with blood group O gives birth to an infant with blood group A or B, and the mothers immune system produces antibodies against the A or B antigens on the infants red blood cells. While ABO hemolytic disease of the newborn is usually a mild condition, it can sometimes lead to more serious complications, such as kernicterus a type of brain damage caused by severe jaundice or hydrops fetalis a severe form of fetal anemia. 