At what time does bilirubin typically peak after birth?

• A. 12-24 hours
• B. 48-96 hours
• C. 1-2 weeks
• D. 3-4 weeks

Answer: (B)

Bilirubin typically peaks in newborns between 48 to 96 hours after birth. This is a normal physiological process known as neonatal jaundice, which occurs in a significant number of newborns due to the immaturity of their liver function. After birth, the newborn's body is adjusting to life outside the womb, and the breakdown of fetal hemoglobin leads to increased production of bilirubin.

During this time, the liver is still developing the capacity to process bilirubin effectively. After its peak around 2 to 4 days, the bilirubin levels usually start to decrease as the liver matures and becomes more competent in conjugating bilirubin. Recognizing this peak timeframe is crucial in clinical practice, as it helps healthcare providers monitor and manage jaundice effectively in newborns, ensuring that it does not progress to pathological levels that could require interventions such as phototherapy.