Compared to Negative Control Group animals, the 2 d Sterile Chorioamnionitis Group animals had significantly increased placental mRNA for IL6 (mean dCt difference = 2.77; 95% CI 5.01 to 0.0.53, p = 0.015) and IL18 (mean dCt difference = 1.79; 95% CI 3.28 to 0.29, p = 0.019). This evidence concerns the gene IL18 and chorioamnionitis.