amniocentesis
noun [ U or S ] uk/ˌæm.ni.əʊ.senˈtiː.sɪs/ us/ˌæm.ni.oʊ.senˈtiː.sɪs/
羊膜穿刺术（从孕妇腹中吸出液体检查胎儿健康状况）
a medical test in which a needle is used to remove a small amount of the liquid that surrounds a baby in the mother's womb in order to examine the baby's condition