When I read the word "doula" in your title I said t myself "Doula? What's d-o-u-l-a???". Ok, my English is poor, but I've never heard about this word, so I googled it and so I can say that my mom had a doudle (ehm, 46 years ago), but there are just few doula here and when I was pregnant I coudn't find any doula for myself, but just a doctor and a nice midwife ^_^
They are so over worked over here that you just cant get the time to know the doctors or midwives so apparently thi is the way to go!
It is a strange word though!