羊膜穿刺术正日益频繁地用于遗传性疾病的诊断是安全准确的。但穿刺前用超声图作胎盘、胎儿和脐带定位的好处,穿刺并发胎儿母体出血,出血对胎)L的影响和对母体的Rh致敏作用都需进一步估价。母体外周血涂片用 Amniocentesis is increasingly safe and accurate for the diagnosis of genetic diseases. However, the use of ultrasound before puncture for placenta, the benefits of fetal and umbilical cord positioning, puncture complicated by fetal bleeding, bleeding on the fetus) L sensitization and the role of the matrix of the Rh require further evaluation. Maternal peripheral blood smears