What are the leading causes of depression and anxiety in women today?

Can you answer Francis M’s question about Depression?:

Females suffer from anxiety and depression at twice the rate of men. In fact, mental disorders such as anxiety and depression are the leading cause of disability for women.

What are the leading causes of anxiety and depression in women? Please provide as credible sources as possible. Thankyou.
Great answers so far!

Bipolar Disorder Manic Depression