Objective To probe into the causes of postpartum hemorrhage and first-aid countermeasures.Method Data of 26 patients with postpartum hemorrhage from January 2003 to December 2010 in our hospital were analyzed retrospectively.Results Among causes of postpartum hemorrhage

laceration of soft birth canal accounted for 19.23%

placental factors 23.08% and uterine inertia 57.69%.The incidence rate of postpartum hemorrhage who had abortion history

childbirth（≥2 times）

gestation week（

>

40 W or

<

37 W） was higher than that for those who had no abortion history

initial childbirth and gestation week（37

4

0 W） respectively

and the differences were statistically significant（p

<

0.05 or p

<

0.01）.Conclusion The uterine inertia is the most important cause of postpartum hemorrhage

followed by placental factors and laceration of birth canal and the postpartum hemorrhage probably has something to do with factors such as the abortion history

times of childbirth and the gestation week.