USING a wireless laptop on their lap can harm a man's fertility, researchers have warned.
Electromagnetic wi-fi radiation could "nuke'' sperm, the scientists said.
Argentinian researchers placed semen samples from 29 healthy men under a laptop hooked into the internet via wi-fi and hit download.
Four hours later some sperm appeared to have been nuked.
A quarter of the sperm were no longer swimming, compared with 14 per cent from samples stored at the same temperature away from the computer.
And 9 per cent of the sperm showed DNA damage three times more than the comparison samples.
Lead researcher Conrado Avendano, of Nascentis Medicina Reproductiva in Cordoba, said in the medical journal Fertility And Sterility: "We do not know whether this effect is induced by all laptop computers connected by wi-fi to the internet or what use conditions heighten this effect.''
The findings fuel concerns raised by other research teams.
Last year urologists found a man sitting with a laptop balanced on his knees can crank up the temperature of his scrotum to levels that can harm sperm.
But Society for Male Reproduction and Urology president Dr Robert Oates said he did not believe laptops were a significant threat to male reproductive health.
"This is a completely artificial setting to me it doesn't have any human biological relevance,'' he told Reuters.
He added that no study had looked at whether laptop use influenced fertility or pregnancy
Electromagnetic wi-fi radiation could "nuke'' sperm, the scientists said.
Argentinian researchers placed semen samples from 29 healthy men under a laptop hooked into the internet via wi-fi and hit download.
Four hours later some sperm appeared to have been nuked.
A quarter of the sperm were no longer swimming, compared with 14 per cent from samples stored at the same temperature away from the computer.
And 9 per cent of the sperm showed DNA damage three times more than the comparison samples.
Lead researcher Conrado Avendano, of Nascentis Medicina Reproductiva in Cordoba, said in the medical journal Fertility And Sterility: "We do not know whether this effect is induced by all laptop computers connected by wi-fi to the internet or what use conditions heighten this effect.''
The findings fuel concerns raised by other research teams.
Last year urologists found a man sitting with a laptop balanced on his knees can crank up the temperature of his scrotum to levels that can harm sperm.
But Society for Male Reproduction and Urology president Dr Robert Oates said he did not believe laptops were a significant threat to male reproductive health.
"This is a completely artificial setting to me it doesn't have any human biological relevance,'' he told Reuters.
He added that no study had looked at whether laptop use influenced fertility or pregnancy
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