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Periodic changes in serum testosterone levels after ejaculation in men

Jiang Ming

Department of Life Science,Hangzhou Normal College.Hangzhou 310020,Zhejiang

Abstract

The purpose of this study was to determine the changes in sex hormone level in men after ejaculation. The serum testosterone concentrations of 28 male volunteers were investigated daily during abstinence period after ejaculation. We found that fluctuations of testosterone levels from day 2 to day 5 of abstinence were minimal. On day 7 of abstinence, a peak of serum testosterone appeared, reaching 145.7% of the baseline (P<0.01). After the peak, no regular fluctuation was observed. Ejaculation was the premise and beginning of the 7 days^ periodic phenomenon. If there was no ejaculation, there was no periodical changes in serum testosterone level. These results indicate that theperiodic change in serum testosterone level is caused by ejaculation.

Key words: Ejaculation;Testosterone

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Citing This Article：

Jiang Ming. Periodic changes in serum testosterone levels after ejaculation in men. Acta Physiol Sin 2002; 54 (6): (in Chinese with English abstract).