i was watching the national geographic channel or TLC and they were talking about conception well not conception but pregnancy...And they were showing the sperms...And the way they showed it, they show the sperm in the uterus and so many obstacles/bars they got to jump/overcome that when is close to the ovum there is only A HANDFUL OF THEM...I didnt know this....I thought that at least: 10,000 reached there and then 1 just made it...But is not the case only: a handful get there out of millions, actually a handful get to the medium surrounding the ovum...This had me thinking...

Suppose someone invented some kind of wave or wireless signals that when bathing people with it without people feeling it it sorts of changes the chemistry of the medium close to the ovum where sperms move causing sperms to die everytime they reach to the ovum, causing women to become infertile/barren/fruitless and not have kids...(i dont know Ph or whatever)...

Because i was thinking, someone could build Antenas with this wireless signals or several stellites in space transmitting this wireless signals all over the world and nobody in the world will have kids....