根据绒膜绒毛的采样和病变来诊断早期妊娠胎儿遗传疾病。绒膜绒毛是妊娠囊外膜-绒毛膜的突出物,以间质为核心,外周两层郎罕细胞和合体滋养层组成。绒毛间质中间的血管网与脐尿囊血管联接。绒毛膜组织来源于受精卵遗传结构假定与胎儿相同。此外,在第8和第12妊娠周之间标本易于采集。绒膜绒毛采样(CVS)可替代中期妊娠羊膜穿刺,此法诊断可靠,并可用为常规检查。这一新方法最低限度地减少了需长期等待诊断中期妊娠的焦急情绪和后期选择性流产的产科和心理并发症。两种采样方法,用脊髓针穿透母体腹壁到达胎 According to the sampling and lesion of chorionic villus to diagnose early gestational fetal genetic disease. Chorionic villus is a pregnancy envelope outer membrane - chorionic prominence, with the stroma as the core, the outer two layers of Lan Han cells and syncytiotrophoblast. Villus interstitial vascular network and the umbilical vascular network. Chorionic tissue derived from the genetic structure of the fertilized egg is assumed to be the same as the fetus. In addition, specimens are easily collected between the 8th and 12th weeks of gestation. Chorionic villi sampling (CVS) can replace amniocentesis in the second trimester of pregnancy, the diagnosis of reliable, and can be used for routine examination. This new approach minimizes the obstetric and psychological complications of anxiety and late-stage selective abortion requiring long-term awaiting diagnosis of a second trimester. Two sampling methods, with the needle through the abdominal wall of the mother to reach the fetal abdominal