hi! good on you for wanting to work in a third world country! i myself have that goal. im in my final year of nursing in australia, and im specialising in midwifery next year, then moving over to kenya indefinitely.
i am faced with the same dilemma as you: and my advice, would definitely be to do midwifery. The course covers all aspects of pre-natal and post-natal care, as well as how to deliver on your own, and i think that you will find that this is one of the biggest need areas.
When i visited africa last year, i heard so many stories of women dying because they couldn't make it to hospital, or couldn't afford to. stories like that break your heart.
It is true, that you really need to have a broad knowledge in ALL areas, as you could quite easily encounter just about anything! while it would be nice to be able to specialise in EVERYTHING: ER, OR, paramedic, Medical etc, i think there is a fine balance between spending too much time specialising, and using that time you would have used up, to specialise in just 1 or 2 areas, and going to the country of your choice.
I have heard that there are courses out there that run over the 3 month year end break, which are specifically designed for persons going to give medical help in 3rd world countries.
The book "where there is no doctor' by david werner (look it up on amazon
) is very useful- it is very easy to understand, and even shows you how to make a plaster cast from boiling the bark from a tree!
if you have any questions please dont hesitate to contact me.