What is the normal value for neonatal jaundice?
Nov 13, 2024
Source: Cainiu Health
Dr. Zhou Xiaofeng
Introduction
The normal values for jaundice in full-term infants typically vary with the number of days after birth. On the first day after birth, the jaundice level generally does not exceed 6 mg/dL; on the second day, it usually remains below 9 mg/dL; and from the third day onward, the normal jaundice value is generally less than 12.9 mg/dL. For premature infants, the level should not exceed 15 mg/dL.
The normal value for neonatal jaundice varies depending on gestational age, postnatal age, and the presence of high-risk factors. Typically, the total serum bilirubin level in full-term newborns should not exceed 12.9 mg/dL, while in preterm infants it should remain below 15 mg/dL. A detailed analysis is as follows:
In full-term infants, the normal bilirubin level usually changes with the number of days after birth. On the first day of life, bilirubin levels generally do not exceed 6 mg/dL; on the second day, they typically remain below 9 mg/dL; from the third day onward, the normal bilirubin level is generally under 12.9 mg/dL. These values are based on the normal bilirubin metabolism observed in full-term infants.
Preterm infants have immature liver function and weaker bilirubin metabolism capacity, so their acceptable bilirubin levels are slightly higher than those of full-term infants. On the first day after birth, bilirubin levels in preterm infants may be up to 7 mg/dL, and thereafter, the normal level generally does not exceed 15 mg/dL.
Bilirubin levels are dynamic and require continuous monitoring to assess trends. If jaundice appears too early, lasts too long, or reaches excessively high levels, it may indicate pathological jaundice, which requires prompt medical evaluation and treatment.
Physiological jaundice usually resolves spontaneously within about two weeks after birth, and parents need not be overly concerned. However, during this period, close attention should be paid to the infant's mental status, feeding behavior, body temperature, and other signs to ensure healthy development.
