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Ejaculate composition after masturbation and coitus in the human male
International Journal of Andrology
|December 1, 1986
Summary
Semen analysis comparing masturbation and coitus shows similar overall accessory gland function. While coitus yields higher semen volume and specific compounds like prostaglandin E, masturbation provides more concentrated sperm, with total sperm counts remaining consistent.
Area of Science:
- Reproductive Biology
- Andrology
- Biochemistry
Background:
- Semen analysis is crucial for assessing male fertility and accessory gland function.
- Understanding how collection methods (masturbation vs. coitus) impact seminal parameters is important for standardization.
Purpose of the Study:
- To compare seminal parameters, including biochemicals and cell counts, in ejaculates obtained via masturbation versus post-coitus in the same individuals.
- To determine if ejaculate collection method affects the assessment of male accessory gland function.
Main Methods:
- Collected ejaculates from the same individuals using both masturbation and after coitus.
- Analyzed semen volume, fructose, acid phosphatase, citric acid, zinc, maltase, testosterone, prostaglandin E, putrescine, spermidine, spermine, and spermatozoa concentrations.
Main Results:
- Coitus resulted in significantly larger semen volume and increased concentrations of prostaglandin E and polyamines.
- Conventional glandular parameters (fructose, enzymes, zinc) showed minimal changes, with slight seminal vesicle dilution post-coitus.
- Masturbation ejaculates were often sperm-rich, but total sperm output was comparable between methods.
Conclusions:
- Semen quality assessment using conventional accessory gland function parameters is reliable regardless of whether ejaculates are collected by masturbation or coitus.
- Specific components like prostaglandin E and polyamines are influenced by the method of collection, suggesting different physiological responses.