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Research Article
Serum thyrotrophin determination on day 5 of life as screening procedure for congenital hypothyroidism.
  1. F Delange,
  2. M Camus,
  3. M Winkler,
  4. J Dodion,
  5. A M Ermans

    Abstract

    In 327 newborns cord blood thyroxine (T4) was 11.8 +/- 0.4 mug/100 ml (SEM) (151.9 +/- 5.1 nmol/l), and serum thyrotrophin (TSH) 6.7+/-1.0 muU/ml. Variability was marked for both T4 and TSH. Remeasured in the same patients on the fifth day of life, the TSH level was 3.7 +/- 1.0 muU/ml, lower than at birth (P less than 0.001), while scattering of TSH values was much smaller, with 99.4 % of values less than 12 muU/ml...

    https://doi.org/10.1136/adc.52.2.89

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