| 释义 |
〔amniocentesis〕A procedure in which a small sample of amniotic fluid is drawn out of the uterus through a needle inserted in the abdomen. The fluid is then analyzed to detect genetic abnormalities in the fetus or to determine the sex of the fetus.羊膜穿刺术：用针刺入腹腔以便从子宫中抽取少量羊水样品的步骤。随后对羊水进行分析，检测胎儿是否遗传异常或用以确定胎儿性别〔reticle〕A grid or pattern placed in the eyepiece of an optical instrument, used to establish scale or position.标线片，标线：置于光学仪器目镜中的格子或图式，用以确定大小或位置 |