But to blame women's higher rate of depression on hormones is too simplistic, experts say.
Survivors of the Khmer Rouge in Cambodia have an extremely high rate of depression.
Or at least the day with the lowest rate of depression, according to our Google searches.
Given that the rate of depression for gay Australians is much higher than the national average, that's a serious concern.
Between sixth and 10th grade, the rate of depression doubles for boys and nearly triples for girls.
The state with the highest rate of depression is North Dakota; the one with the lowest, Virginia.
It is true that older adults who reside in assisted living facilities and nursing homes have a higher rate of depression.
For years, researchers interestd in gender and depression have tended to focus on how the disease affects women, whose rate of depression is twice that of men.
The rate of depression in community-living older adults is no higher and may even be lower than it is in younger adults.
Some experts believe that the rate of depression after bypass surgery is much higher than that of other types of surgery, but not everyone agrees.
"You have very high rates of diabetes, obesity and osteoporosis for women, a very high rate of depression," she said.
