Results
Chareonkrung Pracharak is a general hospital that has a capacity of 400 beds. There are approximately 5,000 births annually. There were 5% PPH in average. Six hundred eighty six cases of singleton pregnant women were enrolled in the present study. Nine subjects were excluded, consisting of five cases in the control group and four cases in the experimental group. All cases in the control group were detected with retained placenta whereas in the experimental group, each case was found to have retained placenta,