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© Georg Thieme Verlag, Stuttgart · New York
No Monthly Variations in Serum Levels of Thyroid Hormones in Human Males
14 March 2008 (online)
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.
Biological rhythms - Thyroxine - Triiodothyronine - Thyrotropin