title: [Circadian rhythm of plasm testosterone levels. II. Testosterone levels during the 1st and 2d half-day].
abstract: Testosterone in plasma is measured in 50 young males in the morning and in the evening by radioimmunoassay. Peaks are found in the morning. At 07,00 h and 10,00 h the values lie on a plateau: 91,77% at 07.00 h and 90,59% at 10.00 h. The difference is not significant. Significant differences however can be noted in comparison between values in the first and second half-day. The difference between the 07.00 h value and the 16.00 h value amounts to 17,08%; between the 07.00 h value and the 19.00 h value, to 22,6%.
mesh_terms: D000293:Adolescent; D000328:Adult; D002940:Circadian Rhythm; D006801:Humans; D008297:Male; D011863:Radioimmunoassay; D013739:Testosterone / Q000097:blood*
chemical_list: D013739:Testosterone
vernacular_title: Circadiane-Rhythmik des Plasmatestosteronspiegels. II. Der Testosteronspiegel in der ersten und zweiten Tageshälfte.