Mean Number of Bacteria by Membrane Layer Among Clinical Groups and Amnion/Chorion Ratio.

Values shown represent mean number of bacteria visualized within the amnion, the chorion, and the representative A/C ratio. Bacterial mean reporting includes standard errors and p values were <0.0001. PPROM = Preterm, premature rupture of membranes (subjects between 24 and 34 weeks following confirmation of rupture of membranes by physical exam). Preterm Labor = subjects between 24 and 34 weeks of gestation with spontaneous preterm labor. Preterm, No Labor = subjects between 24 and 34 weeks of gestation delivered preterm without labor exposure. Term = subjects between 37 and 41 weeks with labor. Term, No Labor = subjects between 37 and 41 weeks without exposure to labor. Rupture = sample of membrane collected at site of rupture. Distant = sample of membrane collected from an area distant to rupture site, most commonly near the placenta.