Wi-fi enabled laptops may be frying men's sperm.
Argentinian researchers obtained semen from 29 healthy men, and stored the samples underneath a laptop computer connected to the internet via Wi-Fi to simulate the experience of using a laptop on one's lap.
Four hours later, the sperm in the samples stored under the computer showed less movement than sperm in samples that were stored at the same temperature but away from the laptop. Nine per cent of the sperm stored below the laptop showed DNA damage - more than three times higher than in the control group.
But other scientists are sceptical.
A UK fertility expert, Dr Allan Pacey, told the BBC scientists should be "cautious" of the findings.
