Breast Screen Victoria is urging all women to get regular mammograms, regardless of their family's history with breast cancer.
A new study of almost 20,000 mammograms over the past two decades found 72 per cent of women diagnosed with breast cancer had no family history of the disease.
Breast Screen Victoria chief executive Vicki Pridmore says the findings contradict popular belief, and all women should take note.
"This is important because most women are listening to the information around family history and going, 'it's not in my family, therefore I don't need to worry'," she said.
"Our message is whether it's in a woman's family or not, that data shows that 72 per cent of those diagnosed had no family history.
"Women will paint their nails, they'll do their hair, they'll go to their dentist even though they don't like going to the dentist and they're doing that far more regularly so we'd just like them to take that 10 minutes every two years.
"Not just once, but the first time, the second time, the third time, right through until they no longer need to come along."