Progress is being made on a world-leading male contraceptive.

The next stage of tests run by New Zealand Clinical Research will give participants multiple doses to see if the oral pill is safe for daily use.  

Phase one demonstrated it was tolerable after a single dose. 

Lead research physician, doctor Rohit Katial, says they'll also learn how long effects last.

"Even though you might stop taking the drug, it might take a bit longer for the sperm levels to come back up, so all of that will be monitored." 

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