What is the normal value for infant jaundice?
Jul 11, 2025
Source: Cainiu Health
Dr. Shen Yonghua
Introduction
The normal values for infant jaundice vary depending on the number of days since birth and gestational age. For full-term infants, bilirubin levels should not exceed 6 mg/dL within 24 hours after birth, 9 mg/dL within 48 hours, and 15 mg/dL after 72 hours. For preterm infants, bilirubin levels should not exceed 18 mg/dL after 72 hours. Jaundice typically appears 2-3 days after birth. If the bilirubin level is within the normal range and the infant is feeding well and in good spirits, it is generally considered normal.
Generally, the normal values for infant jaundice vary depending on the number of days since birth and the gestational age. For full-term infants, the bilirubin level should not exceed 6 mg/dL within 24 hours after birth, 9 mg/dL within 48 hours, and 15 mg/dL after 72 hours. For preterm infants, the bilirubin level should not exceed 18 mg/dL after 72 hours. Detailed analysis is as follows:
Jaundice typically appears on the 2nd to 3rd day after birth. If the bilirubin level is within the normal range and the infant is feeding well and in good spirits, it is usually physiological jaundice. This type of jaundice is caused by the immature liver function in newborns, which temporarily slows down bilirubin metabolism. It generally resolves spontaneously within 7-14 days.
If jaundice appears too early, the bilirubin level exceeds the normal range for the corresponding days, or if jaundice reappears after fading, it may be pathological jaundice. This could be caused by hemolysis, infection, biliary abnormalities, or other factors. Prompt medical intervention is necessary, as excessive bilirubin levels can affect the nervous system.
Monitoring infant jaundice involves observing changes in skin color. If bilirubin levels are abnormal or if other symptoms of discomfort are present, timely medical evaluation is necessary to ensure the infant's health.
