Boddy K, Robinson J S
Lancet. 1971 Dec 4;2(7736):1231-3. doi: 10.1016/s0140-6736(71)90546-0.
An ultrasonic technique for detecting fetal breathing in utero has been developed using chronic fetal lamb preparations, and has been used successfully in pregnant women.
一种利用慢性胎儿羔羊制剂检测子宫内胎儿呼吸的超声技术已被开发出来,并已成功应用于孕妇。