羊水穿刺

amniocentesis (used in Taiwan)

surname Yang

sheep / goat / CL:頭|头[tou2],隻|只[zhi1]

amniotic fluid

surname Shui

water / river / liquid / beverage / additional charges or income / (of clothes) classifier for number of washes

to wear / to put on / to dress / to bore through / to pierce / to perforate / to penetrate / to pass through / to thread

medical puncture to extract bodily fluid (a tap) / body piercing / puncture

(onom.) whoosh

thorn / sting / thrust / to prick / to pierce / to stab / to assassinate / to murder