The counts of villous syncytial knots and stroma fibrosis of villi were more significant in the placenta of group 2 as well .

S／D≥3组与S／D＜3组比较，胎盘第三级绒毛于内小动脉计数显著 减少， 合体滋养细胞结节及出芽、绒毛间质纤维化显著增加；

Results : ( 1 ) The number of the placental villus with the syncytial knots cytotrophoblasts in SAN group was bigger than that in NN group ( P < 0.05 ) .

结果（1）重度窒息组胎盘绒毛具有 合体细胞结节、细胞滋养细胞增生的绒毛数显著高于正常组（P<0.05）；