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Statement on the general reduction in sperm quality

F Comhaire1, K Van Waeleghem, N De Clercq

  • 1University Hospital, Department of Endocrinology, Gent, Belgium.

International Journal of Andrology
|December 1, 1995
PubMed
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Sperm quality has significantly declined in young men over 17 years. Since 1990, over 40% of sperm donors show subnormal characteristics, compared to only 5% before 1980.

Area of Science:

  • Reproductive biology
  • Andrology
  • Human reproduction

Background:

  • Semen quality is crucial for male fertility.
  • Changes in semen parameters over time may indicate environmental or lifestyle impacts.
  • University Hospital of Ghent sperm bank data provides a valuable longitudinal resource.

Purpose of the Study:

  • To assess trends in semen characteristics among sperm bank donors over a 17-year period.
  • To identify changes in sperm motility, morphology, and count.
  • To compare the prevalence of subnormal sperm characteristics before and after 1990.

Main Methods:

  • Analysis of semen samples from 360 young healthy men presenting as candidate sperm donors.
  • Standardized assessment of sperm motility and morphology.

Related Experiment Videos

  • Evaluation of total sperm count per ejaculate.
  • Comparison of data from before 1980 and after 1990.

    • Main Results:

    • A highly significant decrease in sperm motility and morphology was observed over the 17-year study period.
    • Total sperm count per ejaculate did not show a significant decrease.
    • The prevalence of subnormal sperm characteristics increased dramatically, from 5% before 1980 to over 40% since 1990.

    Conclusions:

    • There has been a substantial decline in semen quality among young men in the studied cohort.
    • Reduced sperm motility and morphology are key indicators of this decline.
    • The findings suggest potential adverse factors affecting male reproductive health over recent decades.