Background: Placental bed subinvolution is an underestimated cause of severe, late-onset postpartum hemorrhage.
Case: A case of placental bed subinvolution caused abnormal uterine bleeding in the late postpartum period. Because of difficulties in establishing the diagnosis, massive, intractable and life-threatening uterine hemorrhage occurred, leading to hysterectomy.
Conclusion: Early recognition of placental bed subinvolution allows the use of treatment options capable of preserving the uterus and subsequent fertility.
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