Methods Placentae from 20 cases of prolonged pregnancy (PP), 15 cases of delayed pregnancy (DP), and 29 cases of normal term pregnancy (NTP) were examined by morphometriological feature image anlysis.

• 方法应用图像分析技术对过期妊娠20例(过期组)、延期妊娠15例(延期组)和正常足月妊娠29例(对照组)，进行形态计量学观察。