German carpenter invented the sperm lock valve

Clemens Bimek, a German carpenter invented the valve that interrupts the flow of sperm from a man's testicles, causing him to be temporarily infertile.

According to the Telegraph, Bimek claims the invention will revolutionize contraceptive methods, by allowing men to actively lock their sperm flow with just one switch.

Bimek said the idea of ​​designing the valve dates back to 20 years, when he was shown a documentary about contraception and thought whether it could control sperm flow with just one. Is the van simple?

When he discovered that no one had applied for a patent for such a device, he decided to develop it.

"Many doctors, I advise, that I am kidding. However, there are some encouragement for me to tinker with the fabrication, and use professional knowledge to advise me , " Bimek said.

This valve can cause men to be temporarily infertile.

The van developed by Bimek is expected to be implanted in 25 men in the trial starting this year.

The tiny valve, less than 2.5cm long, 2.8 grams lighter, will be implanted in the vas deferens in a minor surgery lasting about half an hour. They are controlled by a simple on-off switch under the scrotum skin.

Bimek is currently the only person who implements this valve , by local anesthesia. Hartwig Bauer, a urologist, who implanted Bimek, is more ideal than vasectomy.

"One-third of vasectomy people want to remove the tube after that, but it's not always possible to get babies by nature," Bauer said.

Some other doctors are concerned about this new sperm valve technology.

"I think that valve transplantation will cause scarring in the vas deferens," said Wolfgang Buhmann, a spokesman for the German Urology Association. This scar can block sperm from flowing into the penis, even without locking the valve.

He warned, the valve could be clogged over time, if it stayed too long in the body.

"Other implants made of this material have so far been well tolerated in every part of the body," said Anneke Loos, head of a medical product testing center in Hannover.

"The question is, does it cause problems when implanted in the vas deferens?"