BBC News is reporting on a clinical trial of a male contraceptive involving monthly injections of testosterone. From the report:
The monthly testosterone injection works by temporarily blocking sperm production and could revolutionise birth control, experts believe. In trials in China only one man in 100 fathered a child while on the injections...Six months after stopping the jabs the men's sperm counts returned to normal.
This isn't the first time testosterone has been tested as a form of contraception, and more research is needed. It remains a frustrating reality that sustained research into male contraception is a rarity. One question for researchers to answer after these trials is why, according to the BBC, almost a third of the men dropped out before the end of the 2 1/2 year trial study.
Whenever a new form of hormonal birth control is tested or introduced sexual health folks also engage in a prolonged campaign to remind people that protection from conception is not the same as protection from STDs. There's always something good news/bad news about the campaigns that feel like they don't connect with the public, but I'm not sure how it could be done differently.
Read more - BBC News: Male 'contraceptive jab' closer