SOST and gestational diabetes: Placental sclerostin IHC expression (h-score) was significantly greater in placentas of pregnant women with GDM than in those of pregnant women without GDM, especially in villous cytotrophoblasts (h-score: 36.0 ± 12.5 and 7.35 ± 2.0, respectively; P < .001) and syncytiotrophoblasts (h-score: 17.2 ± 5.29 and 1.25 ± 0.44, respectively; P < .001) (Tables 3 and 4; Figs. 2 and 3A).