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Worldwide variations in sperm counts

H Fisch1, E F Ikeguchi, E T Goluboff

  • 1Male Reproductive Center, Columbia-Presbyterian Medical Center, New York, NY 10028, USA.

Urology
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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Sperm counts vary significantly by geographic location. This study reviewed international and US data, finding wide variations in average sperm counts across different nations and regions within the United States.

Area of Science:

  • Reproductive Health
  • Environmental Health
  • Epidemiology

Background:

  • Human disease patterns can differ based on geographic factors.
  • Geographic variations in human health indicators are increasingly recognized.
  • Sperm count is a key indicator of male reproductive health.

Purpose of the Study:

  • To investigate geographic variations in human sperm counts.
  • To compare sperm counts across different nations.
  • To analyze regional differences in sperm counts within the United States.

Main Methods:

  • Systematic literature review of population-based studies.
  • Inclusion of studies evaluating sperm counts in fertile men.
  • Data compilation from 1930 to the present.

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Main Results:

  • Significant geographic variation in sperm counts was observed.
  • Within the US, average sperm counts ranged from 48 million/cc (Iowa) to 134 million/cc (New York).
  • Internationally, average sperm counts ranged from 52.9 million/cc (Thailand) to 102.9 million/cc (France).

Conclusions:

  • Sperm counts exhibit substantial variation across diverse geographic locations.
  • Geographic location is a significant factor influencing sperm counts.
  • Further research into the determinants of these geographic variations is warranted.