Ten ways suggested to reduce risk, which stands at one in eight for Western women - slightly higher if you are White.

1. Avoid over-consumption of alcohol
2. Eat more fruit and vegetables
3. Regular excercise, such as walking
4. Avoid HRT (Hormone Replacement Therapy)
5. Get Screened
6. Give birth - risk lowers substantially with number of children and starting before the age of 30
7. Breast feed. Six months lowers risk and the optimum is two years.
8. Stay slim.
9. Stress of certain types (such as work stress) reputedly helps, but not the kind of stress that is traumatic, as this makes the disease worse
10. Avoid pollutants.
Further research shows that flying regularly will increase the risk. Air hostesses have double the risk which would mean one in four chance of getting it.