近年来随着产前诊断技术的不断发展及超声波设备的迅速普及,目前人们正在探索由早孕期绒毛以代替羊水作检材进行产前诊断,在孕6～11周时抽取绒毛进行染色体及生化分析比羊水细胞检查能更早地对胎儿作出产前诊断,这对优生工作具有重要意义。而用超声显像定位可直接监视抽取绒毛的吸管进入宫腔的位置,能准确、迅速地吸取绒毛,防止刺破孕 In recent years, with the continuous development of prenatal diagnosis technology and the rapid popularization of ultrasound equipment, people are exploring the prenatal diagnosis by replacing the amniotic fluid in the first trimester of pregnancy. At the 6th to 11th week of pregnancy, the villus is taken for chromosome and biochemistry Analysis of prenatal diagnosis of the fetus earlier than amniotic fluid cell examination, which is of great significance to the work of eugenics. The use of ultrasound imaging can directly monitor the location of the suction tube into the uterine cavity, flu can be accurately and quickly to prevent puncture pregnancy