A group of students are reviewing the causes of postpartum hemorrhage. The students demonstrate understanding of the information when they identify which of the following as the most common cause?
A) Labor augmentation
B) Uterine atony
C) Cervical or vaginal lacerations
D) Uterine inversion
B
Feedback:
The most common cause of postpartum hemorrhage is uterine atony, failure of the uterus to contract and retract after birth. The uterus must remain contracted after birth to control bleeding from the placental site. Labor augmentation is a risk factor for postpartum hemorrhage. Lacerations of the birth canal and uterine inversion may cause postpartum hemorrhage, but these are not the most common cause.
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