患者25岁,住院号1224.妊娠39~(+4)周,孕1产1,于1990年2月16日正常分娩一男活婴,体重2900g,发育良好,营养较差.分娩后查胎盘见:胎盘呈哑铃形,脐带较正常为细,长46cm,单脐动脉.胎盘大体标本:二叶哑铃形胎盘,其狭窄处附有脐带,直径1cm,动、静脉各一条.胎盘体积为18cm×10cm×3cm 重380g,母体面胎盘小叶完整,颜色暗红,质地较正常略硬.切面个别区域有砂粒感.镜下:胎盘绒毛发育较成熟,部分绒毛间质纤 Patients 25 years old, hospital 1224. Pregnancy 39 ~ (+4) weeks, 1 pregnant and 1, on February 16, 1990 normal delivery of a male live baby, weight 2900g, well-developed, poor nutrition. : Placenta was dumbbell-shaped, umbilical cord than normal for the fine, long 46cm, single umbilical artery. Placenta gross specimen: two-leaf dumbbell placenta, the stenosis with umbilical cord, diameter 1cm, 10cm × 3cm weight 380g, the placenta maternal placenta leaflets complete, dark red color, the texture is slightly harder than normal .In some sections of the section there is a sense of grit.There are more mature placental villi, part of villus interstitial fibers