Neonatal hyperthyroidism is due to transplacental
transfer of maternal TRAb and occurs in 5% of neonates
of mothers with Graves’ disease (13). FT4 and TSH should
be measured in the cord blood of any infant delivered by
women with a history of Graves’ disease. If the woman
was treated with ATD upto the end of pregnancy, clinical
manifestations of neonatal hyperthyroidism may be only
seen for the first time a few days after delivery, because
the fetus was protected by the ATD received from the
mother during the final weeks of gestation. Antithyroid
treatment and propranolol should be initiated. Either
MMI 0.5–1 mg/kg or PTU 5–10 mg/kg daily should be
given to neonates with hyperthyroidism. Propranolol
2 mg/kg daily is helpful to slow down pulse rate and
reduce hyperactivity in ill neonates. Lugol solution or
potassium iodide and glucocorticoids may also be given
in more severe cases