Effects of prenatal dexamethasone and/or folic acid on the migration and the MMPs expression in HTR-8/SVneo cells. A. HTR-8/SVneo cells migrating from the upper chamber (green), magnification ×100, Bar = 100 μm. B. Cell density of migrated HTR-8/SVneo cells. Each chamber, cells were calculated from five randomly collected visions under fluorescence microscopy. C. The MMP9 mRNA level of HTR-8/SVneo cells. Data represents mean ± S.E.M from three assays, *P < 0.05, **P < 0.01, ***P < 0.001. NN, control; ND, Dex treatment; FN, folate treatment; FD, folate and Dex treatment.