Scientists have presented a new contraceptive for men, tested on mice and 99% effective.

Hormonal, without any side effects, mice in the experiment, it remained sterile for 4-6 weeks. After a long search, scientists have found an experimental compound, GPHR-529, that blocks a protein responsible for binding to a form of vitamin A in cells. By selectively blocking this protein, sterility can be increased without causing any side effects. In mice (males) from the experiment, there was a sharp decrease in spermatozoa, in fact, they became infertile in 99% of cases. And only 4-6 weeks after stopping the drug, the males ceased to be infertile.