A Western Australian mum-to-be has shot to fame in the last fortnight after she announced she has fallen naturally pregnant with quintuplets.

Kim, 26, created the Facebook page Surprised by Five to share her story, which has quickly gained nearly 20,000 followers since its creation on the 21st September.

Kim's quintuplet delivery will be first in Perth in 16 years.

The mum-to-be and her husband had been trying to conceive a third child but encountered difficulties.

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The news that she had finally fallen pregnant sent Kim into "shock and utter excitement", she wrote in an initial post, but that was nothing compared to the news they would eventually hear.

"I was about 7 days past ovulation, my suspicion of a possible multiple pregnancy grew due to the quick rise of the pregnancy hormone," Kim said.

"I was excited at the possibility of twins but absolutely nothing on this earth could have prepared me for what happened next."

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An ultrasound revealed one, then two, and finally five heartbeats.

"My legs start to shake uncontrollably and all I can do is laugh," she said.

View photos An ultrasound revealed one, then two, and finally five heartbeats. Photo: Surprised by Five More

There have been only two sets of quintuplets born in Western Australia since 1980, the most recent in 1999, recent health figures show. There have been 12 sets of quadruplets.

At 12 weeks, Kim has posted on her page that all babies are doing well.

"Poor things are already starting to look squashed," she posted.

While the gender of the babies are unknown at this stage, Kim said some of the babies may be identical.

Kim plans to give birth at Perth’s King Edward Memorial Hospital.



