Summary
Serum testosterone concentrations were measured in adult male Sprague-Dawley rats. A significant circadian testosterone rhythm (p<0.01) was found with peak values at 10.00 and 13.00 h.
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Supported in part by NIH, NCI Grant No. CA 15062 and NIH, NIAMDD Grant No. 5 RO1 AM11376.
The authors would like to acknowledge the excellent technical assistance of Ms.Kris Strom.
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Wilson, M.J., McMillin, J.M., Seal, U.S. et al. Circadian variation of serum testosterone in the adult male rat with a late morning acrophase. Experientia 32, 944–945 (1976). https://doi.org/10.1007/BF02003784
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DOI: https://doi.org/10.1007/BF02003784