My undergraduate work was in computer science and economics. It just happened to be at that time when 34 percent of computer-science majors were women. We didn't realize it was at the peak at the time.

We set out what's going to be our work time versus our foundation time versus family time, and we'll reassess that... sometimes every week.

I went to business school, and I went straight from that to a nine-year career at Microsoft. Eventually, I ran a big chunk of the consumer products division for Microsoft.Then I left with the birth of our first daughter because Bill and I both wanted to have a few kids.

[Bill Gates] wanted me to stay working at Microsoft, but I didn't think he could be CEO and we could have the family life that we both had growing up, which is what we envisioned. I knew I would go back to work at some point later to some profession. I just didn't know what.

Philanthropy is not about the money. It's about using whatever resources you have at your fingertips and applying them to improving the world.

Now we just really need to do the work, which we're doing, to get contraceptives out to women worldwide.

Now, as smartphones are coming up, there are all kinds of apps that will start to be developed that will help women.