Scientists have tested the male contraceptive "on demand" - one hundred percent effective.

They found a compound that blocks sAC activity in sperm. Tests on male laboratory mice showed that after taking the drug with TDI-11861, no more than 6% of spermatozoa remained mobile in one individual. But the effect turned out to be short-lived and completely reversible - the contraceptive effect disappeared in a day. During the second experiment, males who took the drug mated with females. None of the 52 attempts to conceive offspring were unsuccessful. Side effects scientists have not yet found.