Considerations in evaluating human spermatogenesis on the basis of total sperm per ejaculate

Area of Science:

• Reproductive Endocrinology
• Andrology
• Urology

Background:

• Total sperm per ejaculate (TSperm) is a common clinical metric.
• Sperm per hour of abstinence (TSperm/h) offers a more precise evaluation of spermatogenesis.
• Factors influencing TSperm include abstinence interval, sexual arousal, and ejaculation method.

Purpose of the Study:

• To review the factors affecting TSperm.
• To examine the utility of TSperm/h for evaluating spermatogenesis.
• To determine optimal abstinence intervals for diagnostic assessments.

Main Methods:

• Literature review on sperm production and ejaculation parameters.
• Analysis of the relationship between abstinence duration and sperm counts.
• Evaluation of TSperm/h as a rate function for sperm production.

Main Results:

• TSperm increases with abstinence, plateauing after 2-9 days.
• TSperm/h declines after 64-72 hours of abstinence in non-oligozoospermic men.
• Optimal diagnostic distinction of spermatogenesis is achieved with TSperm/h measured after 42-54 hours of abstinence.

Conclusions:

• TSperm/h is a superior metric for assessing sperm production rates.
• Abstinence intervals significantly impact TSperm and TSperm/h.
• Clinicians should utilize TSperm/h with specific abstinence windows for accurate diagnosis.