Men who use laptop computers with the WiFi turned on risk fertility problems, according to a new medical study being presented this week.

"This is the first study showing that microwave radiation from a laptop computer connected by WiFi may damage DNA and decrease sperm motility," said Conrado Avendano, Research Director at the Nascentis Reproductive Medical Center in Argentina.

Avendano presents his findings this week at the annual meeting of the American Society for Reproductive Medicine in Colorado.

"The DNA damage to sperm happened in only four hours," said Avendano.