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The ultrasonic bath is pain free and lasts for up to six months. Picture: Supplied.

Male contraceptive ‘bath’ device wins Dyson award

Named COSO, the device uses ultrasound deep heat to cause sperm mobility in the
testicles to be modified and temporarily cease.

It means the female egg cannot be fertilised by sperm during sex, with users simply
needing to use the device every few months for the contraception to take effect.


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