One of my goals for this project is to 13-direction sound going in the installation-venue. Then the voices of the mothers will come from more than 2 points, and the random thoughts will come from random parts of the space. If you have suggestions on how to make this work, I'd be happy to hear them. All the schemes I've thought of so far have been pretty complicated!
Why 13? Because it's a prime number, which would throw any perceived balance (predictability) off, fill the room with sound-points, and accentuate the feeling of randomness, and therefore the "everywoman" idea. Also, there are usually 13 moons in a calendar year, 13 menstrual cycles, and therefore 13 cycles of a woman's potential to become a mother.