When I look at 225 million women who want contraceptives, and then I look at the 52 million unintended pregnancies that could be avoided by addressing this unmet need, where can we have the biggest impact with our voice, our dollars, our partners? It's on contraceptives. I would rather address the problem upstream.

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

Contraceptives unlock one of the most dormant, but potentially powerful assets in development: women as decision-makers. When women have the power to make choices about their families, they tend to decide precisely what demographers, economists, and development experts recommend. They invest in the long-term human capital of their families.

Helping people doesn't have to be an unsound financial strategy.

Women are the centre of the family. It's the woman who decides what's eaten in the house, when to have the kids vaccinated; everything that has to do with the children's health revolves around her.

Women and girls should be able to determine their own future, no matter where they're born.

As a parent, the responsible thing to do - if you love your child - is to vaccinate your child.