The effect of P4 (10−7 M), E2 (10−9 M), and P4 + E2 (10−7/10−9 M) on IL-1RI:IL-1RII mRNA transcription ratio in epithelial cells ((a); ) and stromal cells ((b); ) after 24 h incubation. Results are normalized against ACTB. Asterisks indicate significant differences (*; **) from the respective control, as determined by nonparametric one-way ANOVA Kruskala-Wallisa followed by Dunns’a test.