The 'Moulin Rouge' actress who became a first time mother at the age of 42, said that she had went swimming in the waterfall while shooting for the film 'Australia' and conceived soon after.

"There is something in the Kununurra water. I never thought that I would get pregnant and give birth to a child, but it happened on this movie. Seven babies were conceived out of this film. We all went swimming in the waterfalls, so we can call it the fertility waters now," the actress who is married to country singer Keith Urban had said in an interview.

While the couple are dogged by rumours of a second pregnancy, women desperate to become mothers are flocking to the waterfalls in Western Australia, reported Daily Mail online.

Kidman who was married to superstar Tom Cruise for ten years had suffered multiple miscarriages during the period and the couple had then adopted two children from her native Australia.