WiFi is having a harmful and detrimental effect on men's sperm, a new study has revealed. According to a Japanese study, further evidence has shown electromagnetic (EM) waves from WiFi devices are contributing to the declining fertility rates in developed countries. The study is believed to be the first to trial a WiFi shield to help protect sperm from the effects of electromagnetic waves. Fifty-one male patients took part in the study. Sperm samples were taken from the men and were divided into three groups, one where samples were not exposed to electromagnetic waves from the WiFi router, one group who were protected by a small WiFi shield, and the last group who were exposed to the waves. [Researcher] Kumiko Nakata ... said sperm samples from participants were placed near a pocket WiFi router similar to how a mobile phone would be carried in a man's trousers. After two hours of being exposed to electromagnetic waves, the motility rate of the shield group was 44.9 per cent and the exposed group sat at just 26.4 per cent, compared to 53.3 per cent from the group not exposed to the waves. After 24 hours, the dead sperm rate of the group not exposed was 8.4 per cent, the shield group was 18.2 per cent, and the exposed group was 23.3 per cent. Nakata says the study strongly shows electromagnetic waves are killing human sperm and that WiFi devices are a contributing factor to declining fertility.