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venerdì 11 marzo 2016

Altro importante lavoro che conferma la relazione tra uso del cellulare e infertililità

Riporto i riferimenti a questo studio epidemiologico cinese che studia la relazione esistente tra volume di traffico dati attraverso l'uso dei cellulari e la qualità dello sperma, attraverso la diminuzione del volume, della concentrazione e della conta .

C'è da aggiungere come scientificamente si sottolinea che se si utilizzassero criteri di sicurezza, sempre più riportati - magari con caratteri piccolissimi - nelle istruzioni presenti nella scatola del cellulare, che dicono di tenere il telefono non a contatto con il corpo,        il danno potrebbe essere ridotto. Ma le società di telefonia sono fermamente contrarie a programmi di informazione (uso di etichette di segnalazione di pericolo):  è ben nota la potentissima azione legale imbastita dalla CTIA americana (una sorta di confindustria della telefonia) contro il comune di Berkeley perché aveva emesso una direttiva di obbligo di etichettatura ... questo in USA ! 
E in Italia ?  La legge 36/2001 ha previsto la etichettatura, ma in questi 15 anni il Ministero dell'Ambiente ... non ha trovato il tempo per emettere un decreto legislativo per introdurre la etichettatura !!!  come mai ?! 




Joel M. Moskowitz comments: This cohort study adds to the body of peer-reviewed research which finds that cell phone use causes sperm damage. For other recently published studies and reviews of this research see Electromagnetic Radiation Safety.
This reproductive health risk would likely be ameliorated if cell phone users abided by manufacturers' safety instructions to keep the phones away from their bodies,

The cell phone "right to know" ordinance adopted by the city of Berkeley is an effort to get consumers to pay attention to these instructions. Unfortunately, the cell phone industry represented by the CTIA--The Wireless Association does not want the public to see this safety information and has sued the City. The Natural Resources Defense Council (NRDC) filed a brief in support of the City. The Association of National Advertisers has just filed a brief in support of the CTIA. The advertisers recommend that the City buy advertising if it wishes to inform consumers to read the cellphone manufacturers' safety instructions.
Although the research on cell phone use and sperm damage has received considerable media coverage in many countries, mainstream media in the U.S. has  largely ignored this health risk.

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Effects of cell phone use on semen parameters: Results from the MARHCS cohort study in Chongqing, China


Zhang G, Yan H, Chen Q, Liu K, Ling X, Sun L, Zhou N, Wang Z, Zou P, Wang X, Tan L, Cui Z, Zhou Z, Liu J, Ao L, Cao J. Effects of cell phone use on semen parameters: Results from the MARHCS cohort study in Chongqing, China. Environ Int. 2016 Mar 4;91:116-121. doi: 10.1016/j.envint.2016.02.028. [Epub ahead of print]

Abstract

Epidemiological and experimental evidence for detrimental effects of cell phone use on semen quality is still equivocal. And that recruiting participants from infertility clinic not from general population may raise the possibility of a selection bias.

To investigate effects of cell phone use on semen parameters in a general population, we screened and documented the cell phone use information of 794 young men from the Male Reproductive Health in Chongqing College students (MARHCS) cohort study in 2013, followed by 666 and 568 in 2014 and 2015, respectively.

In the univariate regression analyses, we found that the daily duration of talking on the cell phone was significantly associated with decreased semen parameters, including sperm concentration [β coefficient=-6.32% per unit daily duration of talking on the cell phone (h); 95% confidence interval (CI), -11.94, -0.34] and total sperm count (-8.23; 95% CI, -14.38, -1.63) in 2013; semen volume (-8.37; 95% CI, -15.93, -0.13) and total sperm count (-16.59; 95% CI, -29.91, -0.73) in 2015]. Internet use via cellular networks was also associated with decreased sperm concentration and total sperm counts in 2013 and decreased semen volume in 2015.
Multivariate analyses were used to adjust for the effects of potential confounders, and significant negative associations between internet use and semen parameters remained. Consistent but nonsignificant negative associations between talking on the cell phone and semen parameters persisted throughout the three study years, and the negative association was statistically significant in a mixed model that considered all three years of data on talking on the cell phone and semen quality.

Our results showed that certain aspects of cell phone use may negatively affect sperm quality in men by decreasing the semen volume, sperm concentration, or sperm count, thus impairing male fertility.

http://1.usa.gov/1pvU2YV

Highlights

• Certain aspects of cell phone use negatively affect semen quality.
• Internet use via cellular networks has become an important risk to semen quality.
• The use of 3G or more advanced networks might have less damage to human sperm.
• Recruiting subjects from a general population makes the study typical and relevant.

Excerpts

In the present study, the daily duration of internet use via cellular networks was found to be associated with decreased sperm concentrations and decreased sperm counts in 2013. Furthermore, data traffic, an accurate quantification of internet use via cellular networks, was found to be associated with decreased semen volumes and decreased sperm counts in 2014 and 2015. This result indicated that internet access via cellular networks should be sufficiently taken into account in future studies concerning the effects of cell phone use on semen quality.

Conclusion

Our results suggest that certain aspects of cell phone use may negatively affect sperm quality in men by decreasing the semen volume, sperm concentration, or sperm count, thus impairing male fertility. Especially, internet access via cellular networks should be sufficiently taken into account in future studies. We advise men with a pregnancy plan to avoid extensive use of cell phones. To identify the effects of cell phone use on semen quality, additional well-designed population studies are needed.

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Effect of Mobile Phones on Sperm Quality

http://bit.ly/saferemrsperm
Pregnancy and Wireless Radiation Riskshttp://bit.ly/saferemrprenatal

Samsung Galaxy S7 and S7 Edge Specific Absorption Rates (SAR)
http://bit.ly/galaxyS7SAR

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Joel M. Moskowitz, Ph.D., Director
Center for Family and Community Health
School of Public Health
University of California, Berkeley

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