Objective: To determine the prevalence of congenital hypothyroidism (CH), permanent and transient CH.
Methods: From November 2006 to September 2007, 63031 newborns were screened by measuring serum TSH obtained by heel prick. The neonates who had a TSH≥5mU/L were recalled for measurement of serum T(4), thyroid stimulating hormone (TSH) and TSH receptor blocking antibodies (TRBAb) in venous samples.