Diatroptov, M E Infradian fluctuations in serum testosterone levels in male laboratory rats. [electronic resource] - Bulletin of experimental biology and medicine Sep 2011 - 638-41 p. digital Publication Type: Journal Article ISSN: 1573-8221 Standard No.: 10.1007/s10517-011-1403-z doi Subjects--Topical Terms: AnimalsAnimals, Outbred StrainsEstrous CycleFemaleMalePeriodicityRatsRats, WistarTestosterone--blood