This is an article getting quite a bit of press on why there aren't more high-level women in science. I agree that times are changing, and I haven't experienced anything like what the older women in the article discussed, but there is still a huge discrepancy.
http://www.nytimes.com/2013/10/06/magazine/why-are-there-still-so-few-women-in-science.html
Here is a response from Scientific American:
http://blogs.scientificamerican.com/the-curious-wavefunction/2013/10/03/on-the-lack-of-women-in-science/
If you want even more, I listened to this NPR segment where they interviewed the author about it:
http://www.npr.org/templates/story/story.php?storyId=229879527
http://www.nytimes.com/2013/10/06/magazine/why-are-there-still-so-few-women-in-science.html
Here is a response from Scientific American:
http://blogs.scientificamerican.com/the-curious-wavefunction/2013/10/03/on-the-lack-of-women-in-science/
If you want even more, I listened to this NPR segment where they interviewed the author about it:
http://www.npr.org/templates/story/story.php?storyId=229879527