Description of cases with histologic chorioamnionitis (HCA).

Maternal and fetal inflammatory response were staged and graded according to criteria published by Redline et al[18]: *Maternal inflammatory response stage 0 = absent, 1 =  early, 2 =  intermediate, 3 =  advanced chorioamnionitis, grade 1 =  mild-moderate, 2 =  severe. #Fetal inflammatory response stage 0 =  absent, 1 =  early, 2 =  intermediate, 3 =  advanced funisitis, grade 1 =  mild-moderate, 2 =  severe. HCA was present if maternal response was grade/stage >1 and/or fetal response was grade/stage >0.
GA = gestational age, Single (S) = single gestation pregnancy, Multiple (M) = multiple gestation pregnancy, Bact. Cult. = bacterial culture result, U. u = Ureaplasma urealyticum, neg = negative, MCB = mixed coliform bacteria, M. H = Mycoplasma hominis, MBF = mixed bacterial flora, C. A = Candida albicans, MGF = mixed genital flora, S. a = Staphylococcus aureus, NA = not available.