منابع مشابه
Falling sperm counts and global oestrogenic pollution: postscript.
T his Special Issue provides reflections after 20 years, summarized in 12 papers, on the controversial issue of alleged decline in human sperm output due to global oestrogen pollution by industrial chemicals. Virtanen et al. offer no specific critique of the original papers but focus on male reproductive function in their native country because Finnish men allegedly have better sperm production...
متن کاملEndocrine disruptors and falling sperm counts: lessons learned or not!
BACKGROUND My research program in the 1970–1990 period was primarily focused on the chemistry, toxicology and mechanisms of action of highly persistent organochlorine environmental contaminants including the polychlorinated biphenyls (PCBs), dibenzofurans and dibenzop-dioxins (Figure 1). Since environmental samples and human residues of these organohalogen compounds (OCs) (or persistent organic...
متن کاملMisconceptions about falling sperm counts and fertility in Europe.
he Science Policy Briefing on male reproductive health published by the authoritative European Science Foundation (ESF) in 2010 echoes the views expressed in the famous paper by Carlsen et al., suggesting that mean sperm counts decreased by 50%. The authors are convinced that the male reproductive system in industrialized countries is under attack from environmental chemicals. This may have far...
متن کاملFalling sperm counts twenty years on: where are we now?
P oor semen quality is an attribute of the human condition that we share with our closest primate ancestors and may be part of our evolutionary inheritance. This characteristic may also reflect the lack of selection pressure on male fertility in advanced societies that have gone through the demographic transition. In the future, such trends may be further exacerbated by the widespread use of AR...
متن کاملSperm Competition, Sperm Numbers and Sperm Quality in Muroid Rodents
Sperm competition favors increases in relative testes mass and production efficiency, and changes in sperm phenotype that result in faster swimming speeds. However, little is known about its effects on traits that contribute to determine the quality of a whole ejaculate (i.e., proportion of motile, viable, morphologically normal and acrosome intact sperm) and that are key determinants of fertil...
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ژورنال
عنوان ژورنال: BMJ
سال: 1994
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.309.6947.131b