Bad news: Wi-Fi might be frying our brains

Not the least is their impact on our ability to reproduce. It is well documented that average male sperm counts are falling by two per cent a year. Many causes have been suggested, from stressful lifestyles to poor diet and ­hormones in our water supplies.

But studies in infertility clinics show problems with sperm dying off or not moving properly are most common in men who use mobiles extensively. This has also been demonstrated in the laboratory.