A 3-day-old neonatal male born at 38 weeks’ gestation to a 37-year-old mother, G1P1, has scleral icterus. He has had difficulty attaching to the breast during feeds. Serum total bilirubin is 11.5 mg/dL. Direct bilirubin is 1.1 mg/dL. Four hours ago, total bilirubin was 11 mg/dL. Hematocrit is 58%. His blood type is B+; the mother’s is O+. Which of the following is the most likely explanation for this patient’s findings?
Breastfeeding jaundice
Breast milk jaundice
Crigler-Najjar syndrome
Hemolytic disease of the newborn (ABO type)
Normal postpartum course
