Answers are grounded in this paper and cite their sources.
The diurnal variation in the immunoassayable TSH content of sera of female and male adult rats under conditions of 12 hours' light and 12 h darkness was determined. In the females the TSH level rose gradually from 11 p.m. to 3 p.m. and then declined, in the males the level rose from 7 p.m. to 11 a.m. and then declined. Scattering of individual values was great (mean coefficient of variation was 0.45–0.46). For the estimation of the serum TSH level these determinants should be known.
No takes yet. Share an insight, caveat, or question.
Leppäluoto et al. (1974) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: