Chorioamnionitis has no impact on immunohistochemical expression of IL-6 in placental membranes of the late preterm delivery regardless of the membrane status.

Objectives: To compare the immunohistochemical expression of IL-6 in placental membranes of late preterm delivery in women with histologically proven chorioamnionitis with and without preterm premature rupture of membranes (PPROM).

Methods: Fetal membranes were collected from 60 women who had late preterm delivery with histologic chorioamnionitis with and without PPROM (30 in each group). Immunohistochemistry for IL-6 was performed on formalin fixed and paraffin-embedded sections. The two groups were matched for age, body mass index and parity. SPSS Version 17.0 was used for statistical analysis.

Results: There was no difference in immunohistochemical expression of IL-6 in placental membranes of women with histologic chorioamnionitis regardless of the membrane status.

Conclusions: Chorioamnionitis has no impact on immunohistochemical expression of IL-6 in placental membranes of women with late preterm delivery despite the clinical presentation.