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. 2013 Dec;30(4):333–339. doi: 10.1055/s-0033-1359726

Table 1. Etiologies of primary and secondary postpartum hemorrhage.

Primary
 Uterine atony
 Genital tract lacerations
 Retained placenta (placenta accreta)
 Uterine rupture
 Coagulation defects
Secondary
 Subinvolution of placental site
 Retained products of conception
 Infection
 Inherited coagulation defects