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Scientists debate whether sperm counts are really falling

BMJ 1998; 316 doi: (Published 23 May 1998) Cite this as: BMJ 1998;316:1558
  1. Janice Hopkins Tanne
  1. New York

    The possible worldwide decline in sperm counts sparked lively debate at a symposium last week entitled Hazardous substances and male reproductive health, which was sponsored by the New York Academy of Medicine and the Mount Sinai School of Medicine in New York.

    A reported decline in sperm counts of around 1% a year between 1930 and 1990 attracted wide attention when it was reported by Dr Niels Skakkebaek, from the Rigshospitalet in Copenhagen (BMJ 1992;305:609-13). However, a reanalysis of data in the paper showed there was no worldwide decline, said Dr Harry …

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