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.

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A protective fluid - filled amniotic sac encloses and cushions the fetus.

充满液体的羊膜包裹并保护胎儿缓和震动.

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The amniotic sac breaks and is expelled in the third stage of labor.

在第三产程,羊膜囊破裂并被排出.

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The white fringe surrounding the bottom is the remnants of the amniotic sac.

右上角是脐带.底部的白色边缘是剩下的羊水膜.

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