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Global decline in semen quality: ignoring the developing world introduces selection bias



Original Research

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Authors: Deonandan R, Jaleel M

Published Date March 2012 Volume 2012:5 Pages 303 - 306
DOI: http://dx.doi.org/10.2147/IJGM.S30673

Received: 08 February 2012
Accepted:27 February 2012
Published:22 March 2012
Raywat Deonandan, Marya Jaleel

Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada

Abstract: Multiple studies from around the world have suggested that semen quality is declining globally. However, all studies suffer from variable semen sampling criteria, selection bias with respect to the types of men volunteering to participate, and a bias with respect to a tendency to examine only samples from high-income countries. This heterogeneity in approaches, especially given the undersampling of rural and less affluent men from low-income countries, calls into question researchers' claims of universally declining semen norms.

Keywords: human semen, quality, global, developing world



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