Early Detection of Hyperthyroidism and Hypothyroidism in Adults and Screening of Newborns for Congenital Hypothyroidism (1990)

The dramatic change in the natural history of this condition since the advent of screening warrants a grade A recommendation even in the absence of randomized control trial. Thus, there is good evidence to include and ensure routine T4 testing of neonates
Screening for congenital hypothyroidism is done by hospitals and is therefore outside the control of most physicians; none the less, primary care physicians should ensure that infants who are born prematurely or at home or who are discharged within 24 hours after birth are tested for hypothyroidism within 7 days after birth.