与三重检验相比，羊膜穿刺术更具有攻击性，它要求用针穿过腹部来提取羊水样本。
Amniocentesis is much more invasive than the triple screen, requiring a needle to extract a sample of the amniotic fluid through the abdomen.
与三重检验相比，羊膜穿刺术更具有攻击性，它要求用针穿过腹部来提取羊水样本。
Amniocentesis is much more invasive than the triple screen requiring a needle to extract a sample of the amniotic fluid through the abdomen.
在羊膜穿刺术中，少量的包围胎儿的羊水(约两大汤匙)被抽取出来。
During an amniocentesis a small amount (usually 2 tablespoons) of amniotic fluid that surrounds the fetus is removed.
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