n.a stethoscope placed on the pregnant woman's abdomen to listen for the fetal heartbeat
同义词：foetoscope
英汉双解大词典
fetoscope/ˈfiːtəʊˌskəʊp/
1.
N（名词）
a fibreoptic instrument that can be passed through the abdomen of a pregnant woman to enable examination of the fetus and withdrawal of blood for sampling in prenatal diagnosis 胎儿镜