Does Hypothyroxinemia of Preterm Neonates Persist Beyond 7 weeks of Life?

Objectives: To determine whether hypothyroxinemia in the early neonatal period normalizes by 7 wk of postnatal age.

Methods: An observational study was carried out from July 2008 through June 2010 in the neonatal and postnatal unit of Chittagong Medical College Hospital, Bangladesh. A total of 150 neonates including 100 preterm and 50 term neonates were selected by convenient sampling.