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Variations in semen parameters from fathers.

T G Cooper1, F Jockenhövel, E Nieschlag

  • 1Institute of Reproductive Medicine, The University, Münster, FRG.

Human Reproduction (Oxford, England)
|July 1, 1991
PubMed
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This study establishes reference ranges for semen parameters in fertile men, including volume, pH, sperm characteristics, and seminal compounds. These findings provide crucial benchmarks for evaluating male fertility and diagnosing infertility in clinical settings.

Area of Science:

  • Reproductive Biology
  • Andrology
  • Clinical Chemistry

Background:

  • Male infertility affects a significant portion of couples seeking reproductive assistance.
  • Establishing normative data for semen parameters is essential for accurate diagnosis and treatment.
  • Seminal fluid composition reflects the functional status of the male reproductive tract.

Purpose of the Study:

  • To determine reference ranges for semen volume, pH, sperm characteristics, and seminal plasma components in a cohort of proven fertile men.
  • To provide a basis for comparison with semen samples from infertile men.

Main Methods:

  • Analysis of semen samples from 25 men who had fathered children within 29 months.
  • Measurement of semen volume, pH, sperm count, morphology, motility, velocity, and concentrations of specific seminal compounds (e.g., fructose, citrate, enzymes, carnitine).

Related Experiment Videos

  • Calculation of lower limits for 96% of values from fertile men.

    • Main Results:

    • Significant inter- and intra-individual variability observed in most semen parameters, except pH.
    • Reference ranges were established for semen volume (≥1.9 ml), pH (≥7.4), total sperm count (≥39 x 10^6), normal morphology (≥42%), motility, velocity, and concentrations of key seminal compounds.
    • Lower limits for various parameters were defined based on the fertile cohort.

    Conclusions:

    • The study provides comprehensive reference ranges for semen parameters in fertile men.
    • These established ranges serve as vital diagnostic standards for assessing male reproductive health and identifying infertility.
    • Understanding the variability within fertile populations is key to interpreting semen analysis results accurately.