Kadiera's Playground Cute but Evil - it averages out

Apparently there's a study published this week that shows that women diagnosed with migraines have a 30% lower risk of breast cancer than those without.

The theory is that both have hormonal components, and migraines tend to follow points where the woman's estrogen is lowest, so combined with the fact that many breast cancers are worse with higher estrogen may suggest that these women naturally have a lower baseline for estrogen levels.