<prompt> At what age is physiological jaundice seen?At birthOne week of lifeOne month of ageOne year of age  <response>: Ans. is b i.e., One week of life Physiological jaundice Most neonates develop visible jaundice due to elevation of unconjugated bilirubin concentration during their first week. This common condition is called physiological jaundice. This pattern of hyperbilirubinemia has been classified into two functionally distinct periods -1. Phase one Last for 5 days in term infant with peak bilirubin levels to 12 mgdl. Last for 7 days in preterm infant with peak bilirubin levels to 15 mgdl.2. Phase two There is decline to about 2 mgdl, which lasts for 2 weeks after which adult values are attained.Criteria for physiological jaundicei Clinical jaundice appears after 24 hours of age.ii Total bilirubin rises by less than 5mgdl per day no sudden rise.iii Peak bilirubin occurs at 3-5 days of age, with a total bilirubin of no more than 15 mgdliv Clinical jaundice is resolved by 1 weeks in term infants and 2 weeks in preterm infants. 