It's difficult to truly prove, but many women have noticed this and complained about it. It is only now that they are finally actually looking in to the possibility.
I find it incredibly ironic that people take it as a given that women's hormones might affect moods (PMS, anyone?), but then brush off women's concerns that taking large doses of female hormones might --in fact!-- have an affect on mood.
To be clear, I'm not denying the possibility that hormonal birth control can cause depression or that many women experience problems while on it (I've heard similar complaints to what you're describing). What I'm commenting on is your misrepresentation of what the study is "proving".
Not to keep arguing a dead point, but the word I cared about was "causes" not "show". The study shows pretty definitively ("proves") that a correlation exists. It does not show that hormonal birth control causes depression.
Regardless, I appreciate that you're making an effort to be careful. I've just been seeing this particular study making the rounds on Facebook and I felt like I needed to point out what the study actually says.
Regardless of semantics, I'm glad you see it being shared on Facebook. I really hope it inspires women to stop taking their pills and go all Lysistrata until there is more research done and/or a better solution is invented. I mean, it's the same thing that was invented back in the 1960s. There's been very little progress.
I wish they could invent something semi permanent for men. Then we could cease having the current child support debates. Temporary vasectomy would be awesome for the world.
I find it incredibly ironic that people take it as a given that women's hormones might affect moods (PMS, anyone?), but then brush off women's concerns that taking large doses of female hormones might --in fact!-- have an affect on mood.