A very pregnant Miranda Kerr has fronted a new video campaign to raise awareness of fistula, a birth complication which can spell death developing countries.

The campaign, organised by Virgin's not-for-profit arm Virgin Unite, co-incided with  V2 Night B4 Halloween, a charity event on Richard Branson-owned Necker island which raised money for the Fight Against Fistula.

In the video Kerr says,

"Fistula is caused when a woman endures a complicated, prolonged delivery without sufficient access to proper medical care.

"For the 3.5 million women suffering from Fistula the injuries leave them incontinent and in most cases their baby dies," she said.

The model, who reportedly follows the Nichiren branch of Buddhism, is no stranger to public awareness campaigns. Her charitable work includes Wildlife Warriors Worldwide and Children International and last year Kerr posed naked, chained to a tree, for the Australian issue of Rolling Stone magazine, in order to attract public attention for protection of the koala's natural habitat.

Find out more about the Fight Against Fistula.