胎儿生长迟缓孕妇胎盘微绒毛的体视学研究

对１２例胎儿生长迟缓及１０例正常胎儿（对照组）的盘组织进行光镜水平和电镜水平的定量观测。ＩＵＧＲ组中，胎盘正常重量指数的有６例，低重量的指数的有６例。结果：ＩＵＧＲ组胎盘重量、胎盘容积、绒毛表面积及绒毛毛细血管表面积均小于对照组，ＮＰＩ组胎盘重量、胎盘容积、绒毛表面积、绒毛毛细血管表面积、微绒行间腔表面积密度和微绒毛表面积绝驿值小于对照组及ＬＰＩ组。

Stereoptical study of the microvilli in intrauterine growth retardation placenta with different ponderal indexes

wo groups of 6 intrauterine growth retardation(IUGR)placentae each from normal ponderal in-dex(NPI)or low ponderal index(LPI) and 10 placentae from normal pregnancy as control were quanti-tatively analyzed with light and electron microscopic morphometry. The results showed that the placen-tal weight,volurne,surface area of the villi and villous fetal capillary in IUGR were significantly reduced compared with those in the control group.Not only were the placental weight,volume,urface area of villi, villous capillary,intermicrovillous surface densitv and absolute values surface area of the microvilli in NPI group significantly lower than that in the control group, but also lower than in LPI group.This suggests that there was a functional deficiency of placenta in IUGR placentae,nonetheless,the changes of functional structures in IUGR placentae wit h different ponderal indexes were not the same. The stereoptical study with light microscopy and with the electron microscopic level in confirming that NPI group has a more severe deficiency in placental function than in the LPI.