CCL20 and chorioamnionitis: Similarly, six cytokines [e.g., MIP-3α (log2 FC = 5.1), Calgranulin A (log2 FC = 4.5), and IL-4 (log2 FC = 1.8)] showed a significant increase in concentration in preterm labor with intra-amniotic infection compared to preterm labor with sterile intra-amniotic inflammation.