The rates of caesarean section have been a major public health concern. Non progressive labor is the leading cause of primary C-sections in the US. It is well known that non-progressive labor is over diagnosed, and determination of the patterns of normal and abnormal labor is fundamental to the formulation of strategies to reduce caesarean section rates. In the US, the total cesarean delivery rate for 2005 rose to the highest level ever reported - 30.3%.After declining between 1989 and 1996, the cesarean rate has increased by 46 percent from the 1996 low of 20.7. The American College of Obstetricians and Gynecologists Task Force on Caesarian Delivery Rates (2000) recommended a C-section rate of 15.5% for nulliparous women for the US for the year 2010.