Letters

Rise in semen quality between 1970 and 1990 in meta-analysis was non-significant

BMJ 1996; 313 doi: https://doi.org/10.1136/bmj.313.7048.44 (Published 06 July 1996) Cite this as: BMJ 1996;313:44
  1. Niels Keiding,
  2. Niels E Skakkebaek
  1. Professor Department of Biostatistics, University of Copenhagen, DK-2200 Copenhagen N, Denmark
  2. Professor Department of Growth and Reproduction, National University Hospital, DK-2100 Copenhagen (null set), Denmark

    EDITOR,—The much discussed meta-analysis by Carlsen and Giwercman and ourselves, which showed …

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