羊よう水すい穿せん刺しようすいせんしMeanings1nounamniocentesismedicineMedical procedure to sample amniotic fluid, typically for prenatal diagnosis.羊よう水すい穿せん刺しは妊にん娠しん中ちゅう期きに行おこなわれることが多おおい。Amniocentesis is often performed during the second trimester.