You see a 1-week-old Asian infant for a weight check. The infant is back to his birth weight and is breastfeeding for 10 minutes every 2 hours with one 3-hour stretch a day. He is alert, has bowel movements with each feeding, and wets 8–10 diapers a day.

You see a 1-week-old Asian infant for a weight check. The infant is back to his birth weight and is breastfeeding for 10 minutes every 2 hours with one 3-hour stretch a day. He is alert, has bowel movements with each feeding, and wets 8–10 diapers a day. His blood type is A+ and his mother’s blood type is A+. Coombs’ testing at birth was negative. You note slight scleral and skin jaundice.