What is the normal pattern for bilirubin levels in a healthy, term newborn?

The normal pattern for bilirubin levels in a healthy, term newborn typically involves a physiological increase followed by a gradual decrease. In this case, bilirubin levels peak between days 2 and 4 of life and usually return to normal levels by around day 10. This pattern is associated with the physiological jaundice observed in many newborns, where the liver is still maturing and may not efficiently process bilirubin immediately after birth.

After birth, many factors contribute to bilirubin levels, including the breakdown of fetal hemoglobin and the neonate's liver function. The peak between 2-4 days reflects the cumulative effect of these processes, while the resolution by day 10 indicates the baby's liver is effectively clearing bilirubin as it matures. This pattern is essential for healthcare providers to identify and monitor, as it helps differentiate between normal physiological jaundice and potential pathological conditions that may require further intervention or treatment.