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New data confirming a circannual rhythm in spermatogenesis.

L Politoff1, M Birkhauser, A Almendral

  • 1University Hospital of Obstetrics and Gynaecology, Basel, Switzerland.

Fertility and Sterility
|September 1, 1989
PubMed
Summary

Spermatogenesis exhibits a seasonal pattern, with sperm counts lower in summer and peaking in winter/spring for both fertile and subfertile men. This finding impacts male fertility diagnostics and treatments.

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Area of Science:

  • Reproductive Biology
  • Chronobiology
  • Andrology

Background:

  • Male fertility is crucial for reproductive health.
  • Understanding seasonal variations in sperm parameters is important for accurate diagnosis and treatment.
  • Previous research suggests potential seasonal influences on semen quality.

Purpose of the Study:

  • To investigate the presence and characteristics of a circannual rhythm in human spermatogenesis.
  • To determine if seasonal variations in sperm parameters differ between fertile and subfertile men.
  • To provide recommendations for optimizing diagnostic and therapeutic interventions for male infertility.

Main Methods:

  • Analysis of 2697 spermiograms from healthy and subfertile men.
  • Statistical evaluation to identify seasonal patterns in sperm count and density.

Related Experiment Videos

  • Comparison of rhythmicity between fertile and subfertile cohorts.

    • Main Results:

    • A significant circannual rhythm was observed in spermatogenesis across all participants.
    • Sperm count and density were lowest during the summer months.
    • Peak sperm parameters were recorded in the winter and spring seasons.

    Conclusions:

    • Spermatogenesis follows a distinct seasonal pattern, impacting sperm quality.
    • Diagnostic spermiograms for male hypofertility should ideally be collected outside of summer.
    • Seasonal fluctuations in sperm density must be considered in assisted reproductive technologies like in vitro fertilization and artificial insemination.