What is the male contraceptive pill?

The male contraceptive pill could mean men take the drug before sex to stop their sperm swimming - thus not fertilising the female egg.

British scientists have discovered a method of ‘switching off’ sperm’s ability to swim, making men temporarily infertile.

To stop the sperm's tails from wiggling, a tiny ‘designer compound’ inserts itself into the swimmers and breaks down the communication.

But this isn't a long-lasting effect, with the infertility only temporary.