Pattern of Congenital Hypothyroidism in Newborns.

Inclusion Criteria: * For the case series study: all positive newborns cases with raised TSH level (the confirmed raised TSH cases after thyroid hormone screening) within one month after birth will be taken during one year. * For the secondary outcome to study the predictors of permanent congenital hypothyroidism and transient neonatal hyperthyrotropinemia, control group with matched age and gender with normal TSH at birth according to the neonatal TSH screening will be taken. Matched normal neonates will be selected to be compared with permanent congenital hypothyroidism cases and transient neonatal hyperthrotropinemia cases. Exclusion Criteria: * Cases that refused to participate in research. * Cases that missed for follow up.