Low Amniotic Fluid
Here is a handout on low amniotic fluid.
http://www.ribirth.net/docs/Amniotic%20Fluid%20Levels.pdf
Great blog post from Gloria Lemay
http://www.glorialemay.com/blog/?p=306
Midwifery Today Article on the topic
http://midwiferytoday.com/articles/biophysical.asp