[-] Show simple item record

dc.contributor.authorSwan, Shanna H.
dc.contributor.authorElkin, Eric P.
dc.contributor.authorFenster, Laura
dc.date.issued2000-10
dc.descriptionReproduced with permission from Environmental Health Perspectives. doi:10.1289/ehp.00108961en_US
dc.description.abstractIn 1992 Carlsen et al. reported a significant global decline in sperm density between 1938 and 1990. We subsequently published a reanalysis of the studies included by Carlsen et al. In that analysis we found significant declines in sperm density in the United States and Europe/Australia after controlling for abstinence time, age, percent of men with proven fertility, and specimen collection method. However, we found no decline in sperm density in non-Western countries, for which data were very limited. In the current study, we used similar methods to analyze an expanded set of studies. We added 47 English language studies published in 1934-1996 to those we had analyzed previously. The average decline in sperm count was virtually unchanged from that reported previously by Carlsen et al. The slopes in the three geographic groupings were also similar to those we reported earlier. As before, studies from other countries showed no trend. These results are consistent with those of Carlsen et al. and our previous results, suggesting that the reported trends are not dependent on the particular studies included by Carlsen et al. and that the observed trends previously reported for 1938-1990 are also seen in data from 1934-1996.en_US
dc.identifier.citationSwan SH, Elkin EP, Fenster L, 2000 The Question of Declining Sperm Density Revisited: An Analysis of 101 Studies Published 1934-1996. Environmental Health Perspectives 108(10) 961-966.en_US
dc.identifier.urihttp://hdl.handle.net/10355/10162
dc.publisherNational Institute of Environmental Health Sciencesen_US
dc.relation.ispartofFamily and Community Medicine publications (MU)en
dc.relation.ispartofcommunityUniversity of Missouri-Columbia. School of Medicine. Department of Family and Community Medicine
dc.source.harvestedEnvironmental Health Perspectives Web siteen_US
dc.subject.lcshSpermatozoaen_US
dc.subject.lcshSemen -- Analysisen_US
dc.subject.lcshFertility, Human
dc.titleThe Question of Declining Sperm Density Revisited: An Analysis of 101 Studies Published 1934-1996en_US
dc.typeArticleen_US


Files in this item

[PDF]

This item appears in the following Collection(s)

[-] Show simple item record