Higher than adults.: Tsh concentrations in children are normally higher than in adults. The nacb (national academy of clinical biochemistry) set age-related reference limits at about 1.3 - 19 µiu/ml in normal-term infants at birth, 0.6–10 µiu/ml at 10 weeks old, 0.4–7.0 µiu/ml at 14 months and gradually dropping to adult levels, or 0.4–4.0 µiu/ml. So 1.3 - 19 µiu/ml is the range for newborns.
Answered 3/9/2013
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