Concentrations of (A) IL-6 (ng/mL), (B) IL-1β (pg/mL), (C) IL-8 (ng/mL), and (D) IL-12p70 (pg/mL) in amniotic fluid from women who underwent spontaneous preterm labor and birth with intra-amniotic inflammation or with intra-amniotic infection. N = 7 – 16 per group. Midlines = medians, boxes = interquartile ranges, and whiskers = minimum/maximum ranges.