This could be a doula, your partner, a family member, friend, or absolutely no one. Who attends or doesn't attend your birth can make all the difference to you.
This is a personal choice you have to make and not factor in what other people may think. Also, if you change your mind at last minute, that is fine too. It is a good idea to have a back plan in case you decide you want certain individuals there after all or want no one. Surround yourself with people who will truly support you in your unassisted birth.
Here are a few suggested readings:
Here is the story my unassisted birth with my twin girls.
Go to the next step Step #6: Visualizing Your Perfect Birth
Go to Birthing Methods Menu