羊膜腔穿刺术是最常用的侵袭性产前诊断技术。医生可以通过抽取羊水得到胎儿的皮肤、肠胃道、泌尿道等的游离细胞，利用这些游离细胞进一步分析胎儿的染色体是否异常。 该手术一般在16~22周时进行，此时羊水中活细胞比例比较高。抽取羊水主要是分析胎儿的染色体组成，其中最重要且常见的就是唐氏综合征。有些单基因疾病，如乙型海洋性贫血、血友病等，也可以通过检验羊水细胞内的基因(DNA组成)得到诊断。
目的： 了解澳门接受羊膜穿刺孕妇的焦虑程度与社会支持的关系。
Objective : To understand the relationship between anxiety level and social support of the gravida who would receive Amniocentesis in Macau.
尽管这些老方法绝不是万无一失的，但它们绝对比后来的羊膜穿刺术、超声有趣。
Even though these old wives' tales are far from foolproof, they are certainly more fun than their more reliable successors, amniocentesis and ultrasound.
然而，羊膜穿刺术最艰难的部分还是等待结果的时候，那要熬两周的时间呢。
The hardest part of the amnio, though, is waiting for the results, which take two weeks to process.
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