Getting a career in IT world can be a struggle for women - that should be acknowledged. Not every company will be welcoming/friendly. IT society also and that includes open source society as well. Somewhere you will find an acceptance somewhere you will hit the human brick wall as Randy Pausch said.
But hey, that's life.
If you are in an IT world and even better if you have an IT background you know what I am talking about.
So, you are a lady and you would like to have a career in IT world but you are struggling somehow. I think I can help you.
Free and open source technology world offers much more than a proprietary world and that also doesn't need proves. You can join projects, work with people and show what you are made of and in case you didn't know, you can develop a career in that world.
You can start as a volunteer and eventually someone will notice you. That's one way. Maybe it is a harder/longer way but it is a good way. IT companies will appreciate that - trust me. If they'll see on your CV that you are an active person who doesn't wait for opportunities but makes them than you are on a good way to make a career. Also, do not be afraid of making risks. Push your limits every day.
The other (slightly faster?) way is applying for an internship that Open Source companies offer. How to do that? Please read an article about Outreach Program for Women. If you have read it you have noticed important dates when next round for applying will be up and running. That is your chance. Grab it with both hands.
I'm giving you a heads up to start preparing for an internship because it won't be easy. I didn't make it in May because I needed more background in Linux kernel hacking and didn't have time to dedicate myself enough because I was overloaded with DORS/CLUC 2013 convention preparations.
Start learning now, start researching and prepare yourself. Even if you fail at first as I did don't make it stop you. Apply for the next round because you will know what will be expected from you. Application process and first contribution may seem easy at first glance but they are not. It is intensive, you will have competitors who will be stronger than you etc...etc...
After first Linux kernel Hacking I had a plan in my head that I would apply for the next round but certain people changed my life. I got an opportunity for an open source career which I think that suits my personality better. Being a system administrator enables me to touch many different areas - from monitoring and analysis to hacking and going through lots of different technology.
So, getting an open source (IT) career can be a struggle but it is definitely doable. Everything depends on you and your will. It doesn't matter how you start. It matters that you start!