Lindy Klim, 39, shows off her baby bump in mirror selfie

She's about to give birth to her fourth child with fiance Adam Ellis.

And Lindy Klim has excitedly revealed her pre-labour contractions have begun.

On Saturday, the 39-year-old social media enthusiast took to Instagram to share a sultry mirror selfie as she revealed her news.

Counting down the days! On Saturday, Lindy Klim took to Instagram to share a sultry mirror selfie as she revealed her pre-labour contractions have begun

Counting down the days! On Saturday, Lindy Klim took to Instagram to share a sultry mirror selfie as she revealed her pre-labour contractions have begun

'My last Saturday with the bump.... pre labour contractions have began... so excited!' Lindy captioned the snap, which showed her belly burgeoning out beneath her skimpy black bikini top.

The upload appeared to be a sponsored post, with the raven-haired adding: 'Thanks to @nutralifeau for keeping me healthy!'

She then completed her post by listing the benefits of taking the company's supplements, hash-tagging: '#KyolicAgedGarlic #NaturalMedicine #LoweringMyRiskofHeartDisease #ReducesBloodPressure #ScientificResearch'

Bumping along nicely! Lindy recently shared her best pre natal fitness and beauty secrets that have kept her in top form throughout her pregnancy

Bumping along nicely! Lindy recently shared her best pre natal fitness and secrets that have kept her in top form throughout her pregnancy

It comes after Lindy shared her best pre natal fitness and secrets that have kept her in top

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