报道了350例羊水穿刺(怀孕第二个三个月)用于遗传病产前诊断的结果。其中193例是由于母亲年龄超过35岁,具有不平衡染色体异常的胎儿是6例,占3％。30例是因为过去已生过一个神经管缺陷的儿童,发现有一个为无脑胎儿。羊水细胞培养的成功率达96％,大约3％的病人羊水穿刺失败,得不到羊水。在羊水穿刺后自发流产的危险为 Reported 350 cases of amniocentesis (second trimester of pregnancy) for the genetic diagnosis of prenatal diagnosis results. Of these, 193 were due to a maternal age of 35 or older, 6 with unbalanced chromosomal abnormalities, or 3%. 30 cases because of the past had a child with neural tube defects, found to have a brainless fetus. Amniotic fluid cell culture success rate of 96%, about 3% of patients failed amniocentesis, amniotic fluid can not be obtained. The risk of spontaneous abortion after amniocentesis is