Opportunities for doula work internationally?

It's ask-the-readers time! I recently got this e-mail from Leila:

I live in the Boston area and am currently in the process of becoming a doula. I also plan on getting my masters in public health soon after I finish college. Your blog brings me lot of hope and excitement as I wet my feet in the field of public health! Maybe you can offer me some advice- I'm trying to find ways of working/volunteering as a doula somewhere in the Third World and I can't find anything! Do you have ideas or know of organizations I could look into that might offer such positions?

I had only one or two possible leads, and I have heard similar inquires in the past and not really known where to send people then either. Does anyone out there have suggestions for her?