مولود عمره ٣ أيام عنده يرقان ظهر في اليوم الثاني، ويرضع جيداً، والبيليروبين تحت حد العلاج. ما التفسير الأرجح؟

A 3-day-old has jaundice that appeared on day 2, feeds well, and bilirubin is below the treatment threshold. What is the most likely explanation?

1. Haemolysis from blood group incompatibility
2. Normal physiological jaundice
3. Acute viral hepatitis
4. Biliary atresia

Answer: B) Normal physiological jaundice. Physiological jaundice appears after 24 hours and peaks on days 3–5; jaundice within the first 24 hours is abnormal and needs urgent assessment.