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A research on the relationship between ejaculation and serum testosterone level in men.
Ming Jiang1, Jiang Xin, Qiang Zou
1Department of Life Science, Hangzhou Normal College, Hangzhou 310020, China. jiangmy@mail.hz.zj.cn
Journal of Zhejiang University. Science
|March 28, 2003
Summary
Ejaculation triggers a distinct 7-day cycle in male serum testosterone levels, with a significant peak observed on the seventh day of abstinence. This finding highlights a new understanding of testosterone regulation.
Area of Science:
- Endocrinology
- Reproductive Health
- Human Physiology
Background:
- Serum testosterone levels are crucial for male reproductive health and overall well-being.
- Understanding the factors influencing testosterone fluctuations is important for clinical and research purposes.
Purpose of the Study:
- To investigate the relationship between ejaculation and the cyclical variations in serum testosterone levels in men.
- To identify the specific pattern and timing of testosterone changes following ejaculation.
Main Methods:
- Serum testosterone concentrations were monitored daily in 28 male volunteers over two abstinence phases post-ejaculation.
- Baseline testosterone levels were established before the observation periods.
Main Results:
- Testosterone levels showed minimal fluctuation between the 2nd and 5th days of abstinence.
- A significant peak in serum testosterone (145.7% of baseline) was observed on the 7th day of abstinence (P < 0.01).
- No regular fluctuations were noted after the 7-day peak.
Conclusions:
- Ejaculation initiates a unique, periodic fluctuation in serum testosterone levels.
- The observed testosterone cycle is characterized by a peak on the 7th day of abstinence, with a minimum effective duration of 7 days.
- These findings provide the first documentation of ejaculation-induced periodic changes in serum testosterone and their characteristics.