Keywords: Honokiol; Preterm birth; Infection; Inflammation; Myometrium; Fetal membranes; fsl-1; fibroblast-stimulating lipopeptide-1; PG; prostaglandin; PTGFR; prostaglandin F receptor; LPS; lipopolysaccharide; PTGS2; prostaglandin-endoperoxide synthase 2; NF-κB;