Jaundice at 24 hrs to 2 wks of age Physiological jaundice Infection: unconjugated hyperbilirubinemia; abnormal metabolism of bilirubin; pneumonia, sepsis, hepatitis urinary tract infection Other causes: bruising, polycythaemia(venous hematocrit >65%0; Crigler-Najjar syndrome(inherited deficiency of enzyme glucuronyl transferase)Jaundice at 24 hrs to 2 wks of age Physiological jaundice Infection: unconjugated hyperbilirubinemia; abnormal metabolism of bilirubin; pneumonia, sepsis, hepatitis, urinary tract infection. Other causes: bruising, polycythaemia (venous hematocrit >65%); Crigler-Najjar syndrome (inherited deficiency of enzyme glucuronyl transferase)