Jaundice at birth or within 24 hours of birth is commonly due to –
Jaundice present at birth or within 24 hours of life

Erythroblastosis fetalis (Rh incompatibility) —> most common cause            o Concealed hemorrhage
ABO incompatibility
Congenital infections ---> Rubella, syphilis, CMV, toxoplasmosis                  o Sepsis
Red cell enzyme defects (G6PD deficiency)
Red cell membrane defect (Hereditary spherocytosis) 
	Jaundice appearing on 2" or 3rd days of life
Physiological                                o Crigler - Najjar syndrome              o Early onset breast milk jaundice
	Jaundice appearing from 3' to 7"1 days of life
Bacterial sepsis    o Urinary tract infection


Other infections —3 syphilis, CMV, enterovirus, toxoplasmosis      o Polycythemia

Jaundice appearing after 1st week of life

All the causes of jaundice, which have been mentioned in previous explanations, can appear after 1" week.
Erythroblastosis
Congenital hyperbilirubinemia
Biliary atresia
Physiological