I personally don't think it's just women who have all these mental disorders and problems, a lot of men have them to.
Depression is a big issue in our world today, i doubt you'll find many who don't suffer from it. And i personally think it's down to a lot of the crap we are fed through magazines, T.V. and music about all the so called troubles in our lives. We all know about social conditioning and it does work the same with depression to.
Just think about it, your told and shown for hours a day, 7 days a week for months, even years, about how you should be living, what you should own, how you should look. That's going to chip away at your confidence over time and make you wonder about yourself, make you feel your missing something in your life. If your strong these things don't really effect you, but for most people they do, especially women. Half of what you feel you need can not be gained ever, we all know that in the fact that on T.V. and in movies we are shown the image of the perfect, faithful woman. If we desired and aimed to find her we'd get depressed when we found women weren't like that, when our search would never be over.
Factor into that family troubles and problems with friends, regrets about things they've done that week or the night before and you can't help but not get depressed. And as has been said by other members already, women are highly emotionally. It's quite sad really. Half the people i know drink and take drus to escape this fact, to run from the reality of their lives... that really pisses me off. But that's off topic.