Fig. 2.

Association of common clinical assessment markers of PTB and CVF cytokines at late mid-trimester (26⁺⁰–28⁺⁶ weeks). Correlation of fetal fibronectin (FFN), IL-1β, and RANTES concentrations, n = 47 (A–B); and correlation of vaginal pH and IL-1β, n = 49 (C), for both study cohorts.