Amniocentesis is the removal of fluid from the amniotic sac . 羊膜穿刺术是从羊膜囊抽取羊水的技术。
2.
Amniocentesis should be done by a physician skilled in the technique, after the patient has had appropriate counseling and has given her informed consent . 进行羊膜穿刺术应在病人经过适当的咨询，并得到病人同意后，由技术熟练的医生进行。
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After amniocentesis and prenatal counseling , the couple chose to terminate the pregnancy 经羊膜穿刺术检查染色体正常。
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Karyotyping for adanced maternal age was performed by amniocentesis and demonstrated a normal male karyotype ( 46 xy with g - banding ) 对此高龄孕妇行羊膜穿刺染色体组型分型检查，先是正常男性（ 46xy ， g带显带技术） 。
5.
Consequently , an excess number of otherwise normal pregnancies would be recommended to undergo definitive testing to ensure as many downs syndrome fetuses could be detected prenatally . however , conventional definitive genetic testing employs invasive methods , such as amniocentesis to obtain fetal tissue for testing , thus carrying a risk to the fetus 但传统的基因测试，例如羊膜穿刺术（俗称抽羊胎水）属入侵性诊断方法，即是要用针穿过母体进入子宫，抽取胎儿细胞，会为孕妇带来一定的风险（例如流产） 。
