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icterus neonato´rum jaundice in newborn infants, as seen in erythroblastosis fetalis. Called also neonatal jaundice and jaundice of the newborn.
icterus prae´cox mild jaundice developing within the first 24 hours of life (before physiologic jaundice normally occurs), due to ABO blood group incompatibility between mother and infant; it usually clears rapidly and spontaneously, only occasionally resulting in hemolytic disease.
a relatively innocent but rapidly developing type of jaundice with mild anemia in neonates, most frequently caused by ABO incompatibility between mother and fetus.