No Monthly Variations in Serum Levels of Thyroid Hormones in Human Males

E. Taubøll; L. Gjerstad; K. T. Stokke; Ragnhild Wergeland

doi:10.1055/s-2007-1012358

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Horm Metab Res 1986; 18(7): 500-501
DOI: 10.1055/s-2007-1012358

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No Monthly Variations in Serum Levels of Thyroid Hormones in Human Males

E. Taubøll, L. Gjerstad, K. T. Stokke¹ , Ragnhild Wergeland¹

Department of Neurology, Rikshospitalet, The National Hospital, University of Oslo, Oslo, Norway
¹Department of Clinical Chemistry, Rikshospitalet, The National Hospital, University of Oslo, Oslo, Norway

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Publication History

1986

1986

Publication Date:
14 March 2008 (online)

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Summary

There have been very few reports on rhythmic variation in thyroid hormone concentrations with a periodicity of 4-6 weeks. In an attempt to evaluate whether such a rhythm is a general phenomenon we studied ten healthy male students with weekly blood samples over 12 weeks for T4, T3 and TSH. No rhythmicity could be demonstrated.

Key-Words

Biological rhythms - Thyroxine - Triiodothyronine - Thyrotropin