This isn't exactly new. Vasalgel offers a similar injection that blocks the tubes, however before then back in the early 2010's there was also a guy in India testing a better version which did not block the tubes - the compound was polarised, and when the sperm went through it was disoriented such that it couldn't swim to the egg. The human clinical trials had a 100% success rate at preventing pregnancy, albeit human trials tend not to have that many people (I think there were 26). My understanding is that this became Vasalgel because the pharmacuetical industry didn't like the fact that it completely avoided the complications that can come with vasectomies where the tube is completely blocked.