Male contraceptives have traditionally been limited to condoms or vasectomies, which aren’t ideal solutions. Researchers at Weill Cornell Medicine have developed a new drug. It works by targeting a protein called soluble adenylyl cyclase (sAC), which is vital for sperm function. They tested it by using male mice and proceeded to give a single injection of TDI-11861 the Sac inhibitor. This inhibited the mice’s sperm within 30 to 60 minutes, and remained 100% effective for up to two and a half hours. By the three-hour mark, some sperm began to regain their motility, and after 24 hours the mice were essentially back to full fertility. The results if extrapolated to humans, has all the qualities of a very useful pill. The flexibility makes it a more appealing option than other experimental male contraceptives which can take weeks to reduce fertility or regain it if you want to start trying for children. Taking a pill is less invasive than getting a gel injected into the vas deferens.