Sera Lilly's world changed forever when the mother-of-five almost died following the birth of her fifth baby.

The fashion designer turned fitness blogger told The Hits Sarah, Sam and Toni how she developed a rare condition known as Ogilvie Syndrome, suffering a perforated bowel after giving birth via C-section.

"It was like someone had stabbed me with a knife," Sera told the trio, describing the pain of her burst bowel, which turned out to be life-threatening.

After battling with doctors who initially misdiagnosed her, she says she finally received life-saving surgery.

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Your worth is not measured by the size of your waist ♡ Snap chat: seralilly_nz

A post shared by Sera Lilly (@fitwithseralilly) on

Since then Sera claims she has gained a new perspective on life and has had the courage to chase her dreams while recovering from the "traumatic" experience.

"It made me realise what I wanted to do with my life," she said.

"There are a lot of things that I hadn't done because I was scared to [but now it's like] screw it just do it."

Sera is now a qualified personal trainer and her goal is to inspire other women to get fit, happy and healthy. She has even launched her own fitness app.

Embrace and love your body. It's the most amazing thing you'll ever own ♡

A post shared by Sera Lilly (@fitwithseralilly) on

"To me, fitness isn't a number on a scale or a clothing size – it's a lifestyle."

This story originally appeared on The Hits and has been republished with permission.