BBC NEWS | Health | Male 'contraceptive jab' closer

BBC NEWS | Health | Male 'contraceptive jab' closer: "A male contraceptive jab could be as effective at preventing pregnancies as the female pill or condoms, work shows.

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, the Journal of Clinical Endocrinology & Metabolism reports.

Six months after stopping the jabs the men's sperm counts returned to normal."