“…Many other factors, although not strictly connected to neonatal bilirubin metabolism, can affect total serum bilirubin and physiological jaundice in the newborn: low weight, ABO incompatibility, sepsis, breast feeding, smoking mother, exposure to light, birth season, administration of drugs to the mother before delivery, use of oxytocin to induce delivery [7,15]. Our study obviously is unable to take into account all these factors.…”