A new male contraceptive gel is set to go on trial next year, designed to prevent pregnancy by halting the production of sperm.
More than 400 couples will test the product for the major study, due to launch in April 2018.
The trial will mark one of the largest tests on a hormonal male contraceptive to date, involving participants from the U.K., U.S., Sweden, Italy, Chile and Kenya.
Currently, contraception options for men are limited, with just two choices on the market: condoms or a vasectomy.