Examination of 15 autopsies of puerperas who died in the first postpartum days has identified the pathomorphological and immunohistochemical signs differentiating labor sepsis from the other type - postpartum sepsis. Labor sepsis that runs typically of a systemic inflammatory reaction is characterized by initial antenatal inflammation of the fetal membranes and placenta with the latter's immunoimaging of granulocytes, macrophages, plasma cells, and tumor necrosis factor. Moreover, labor sepsis runs in the presence of suppressed cellular and humoral immunity in the spleen and lymph nodes. The relative intact pattern of the uterine endo- and myometrium is retained with generalization of an inflammatory reaction along the organs. The pathologist who analyzes female pyoinflammatory diseases in the postpartum period should meticulously investigate all placental components in addition to a puerpera's organs.
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