Perth mum Nicole Yarran was diagnosed with bowel cancer after a pregnancy ultrasound for her third child.
The 32-year-old mother's health deteriorated quickly after that fateful ultrasound, when doctors found eight "golf-ball sized tumours" on her liver.
She had been showing symptoms for two years but doctors diagnosed irritable bowel syndrome (IBS).
"She told him the symptoms, that she had bleeding from the bowel," her mother, Kathy Narrier, told ABC's 7.30.