A meta-analysis of 61 sperm count studies revisited
S Becker Department of Population Dynamics, School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA Fertil Steril 67:1103-8. 1997
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A meta-analysis of 61 sperm count studies revisited
S Becker Department of Population Dynamics, School of Public Health, Johns Hopkins University, Baltimore, Maryland 21205, USA Fertil Steril 67:1103-8. 1997
..To re-examine data on sperm counts over time from 61 studies from around the world...