videos or dvds for stages of labor and interventions/medications

<p>Does anyone have any suggestions for great videos on stages of labor or interventions.  I have been a doula for years and am starting my independent CBE practice.  They showed <a href="http://injoyvideos.com/products-1/childbirth/understanding-birth.html" target="_blank">Understanding Birth 2</a> by InJoy and it was great but I don't love the price tag.  I want to work towards that video but I wasn't sure if there were good cheaper alternatives while I get started.</p>