Keeping a mobile (cell) phone in the pocket can damage sperm, and affect a man's fertility.
Sperm number and movement, or motility, is affected by electromagnetic radiation when a mobile phone is carried around in trouser pockets, say researchers.
Researchers from the University of Exeter analysed 10 studies, involving 1,492 men, and found that nine of them had discovered deterioration in sperm quality.
The overall decline was around 8 per cent, the researchers say, which is probably not significant in a healthy man, but it could be an important factor in any man who is already suffering from poor fertility.
(Source: Environment International, 2014; 70: 106-112)