A South African doctor has invented a device that she says will help reduce the number of rapes and ensure that culprits are caught.

Dr Sonnette Ehlers spent 40 years and over 1m rand ($135,000) developing the Rape-aXe, a female condom with 'teeth'.

She sold her house and car to fund the project.

According to Human Rights Watch, South Africa has one of the highest rates of rape in the world.

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First broadcast 22 June 2010