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Effects of prenatal dexamethasone exposure (PDE) on the placental villous capillaries. (A) Villous capillaries with CD31 expression in the placental labyrinth zone (×400). Red arrow: villous capillaries. (B) Length density, (C) surface density, (D) fetal capillary surface area. Data are presented as the mean ± S.E.M., n=11 in each group. *, P<0.05, **, P<0.01 vs. corresponding controls. PDE (L): 0.2 mg/kg·d; PDE (H): 0.8 mg/kg·d.
