Variability in erythroblastosis fetalis:  a study of multiple pregnancies and of twins.
D004899:Erythroblastosis, Fetal; D005260:Female; D006402:Hematologic Diseases; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins
ERYTHROBLASTOSIS, FETAL