Sadly it seems true: Recently conduceted investigation by one of my friends team revelled low sperm count in male working in an Industrial park related to IT. Hence, lap tops, and more seriously avoid putting mobiles in your trouser pockets too close to your nuts. The effect is said to be in the damage to the Sertoli cells, that nourish the sperms and help them mature. Like wise the leydig cells that produce the testosterone is also reported to age faster, leading to reduction in testosterone synthesis. The culprit whether it is the magnetic, electric signal or the combination of both with known stress related is not yet ascertained clearly, but precautive measure is best. Avoid mobiles in your shit pockets close to your heart, that interferes with hearts rythmicity.