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Reanalysis Of International Data Finds Sharp Decline In Sperm Density

orine compounds in the subjects' seminal fluid. In another, investigators found that a general decline in sperm concentration during the years 1949 to 1981 was statistically linked to an overall increase in several environmental exposures.

While there is no evidence that this apparent decline in sperm density has led to reduced fertility, the authors say sperm count may be a surrogate indicator of effects on the male reproductive system. They say, for example, that in countries such as Denmark, England and the United States, where sperm counts have fallen, the incidence of testicular cancer has increased dramatically over the last 25 years, while in Finland, where sperm counts are still relatively high, testicular cancer rates have remained low.

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Contact: John Peterson
Peterso4@niehs.nih.gov
(919) 541-7860
NIH/National Institute of Environmental Health Sciences
24-Nov-1997


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