I don't think we need to get to 50% - I would just like it so that women don't feel like they're pushed out - some of it is cultural (it's easier to believe that you can't do something as well as the next person when the messages around you reinforce that this isn't the right field to you) - but some of it is a negative atmosphere created by the sexist jerks.

And it's not most, or even many of the guys I've worked with, but it just takes one or two to complete ruin an environment. Had a had a child when I had planned to, I can almost guaranteeing that I wouldn't have bothered returning to software development.

It's better now - I don't know if it's because I work in a different city, with different people, or maybe I'm just older and the younger women deal with the same old crap. It'll still pop up from time to time - and I'm getting better at seeing the warning signs that someone is going to be that person, deal with it before it saps any of the remaining enjoyment I have for the field.