Excess of group O-mothers in ABO-haemolytic disease.
D001789:Blood Group Antigens; D004899:Erythroblastosis, Fetal / Q000706:statistics & numerical data*; D005333:Fetus; D006402:Hematologic Diseases; D006801:Humans; D007231:Infant, Newborn; D009035:Mothers
D001789:Blood Group Antigens
BLOOD GROUPS; ERYTHROBLASTOSIS, FETAL/statistics