A child from the first noncomplicated pregnancy but complicated labor had cephalhematoma. On the second day there developed jaundice. On the 3th day appeared changes of neurologic status: nystagmus, Graefe's sign. Urea is yellow, feces- golden-yellow. Mother's blood group is A(II)Rh-, child-A(II)Rh . On the third day child's Hb is 200 g/L, RBC- 6,1 × 1012/l, bilirubin in blood - 58 mk mol/L due to unconjugated bilirubin, Ht- 0,57 What is the child's jaundice explanation?