(CNN) -- Keeping a cell phone on talk mode in a pocket can decrease sperm quality, according to new research from the Cleveland Clinic.
A Cleveland Clinic study shows that mobile phones left on talk mode in a pocket can hurt sperm quality.
"We believe that these devices are used because we consider them very safe, but it could cause harmful effects due to the proximity of the phones and the exposure that they are causing to the gonads," says lead researcher Ashok Agarwal, the Director of the Center for Reproductive Medicine.
In the small study, Agarwal's team took semen samples from 32 men and brought them to the lab. Each man's sample was placed into small, conical tubes and divided into two parts: a test group and a control group. The control group was unexposed to cell phone emissions, but kept under the same conditions and temperature as the test group.
The semen in the test group was placed 2.5 centimeters from an 850 MHz cell phone in talk mode for 1 hour. Researchers say that 850 MHz is the most commonly used frequency.
They used the measurement of 2.5 centimeters to mimic the distance between the trouser pocket and the testes. Agarwal reasoned that many men keep their active cell phones in their pants pocket while talking on their headsets.
The semen in the test group was placed 2.5 centimeters from an 850 MHz cell phone in talk mode for 1 hour. Researchers say that 850 MHz is the most commonly used frequency.
Overall, researchers found an increase in oxidative stress such as a significant increase in free radicals and oxidants and a decrease in antioxidants. Agarwal says that equals a decrease in sperm's quality, including motility and viability. Evidence of oxidative stress can appear under other conditions, including exposure to certain environmental pollutants or infections in the urinary genital tract. [ source ]
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