Article
Semen quality and male reproductive health: the controversy about human sperm concentration decline<sup>Note</sup>
1 May 2001
Abstract excerpt
Concern about the effect of environmental changes on male reproductive health has grown in recent years to become a major preoccupation in some developed countries. A possible decline in human sperm concentration was suggested in the early seventies following studies in the US. In 1992 a meta-analysis of 61 articles published by Carlsen et al. concluded that the mean sperm count of healthy men had declined by 1%...
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