David H, Weaver J B, Pearson J F
Br Med J. 1975 Apr 12;2(5962):62-4. doi: 10.1136/bmj.2.5962.62.
The possibility that Doppler ultrasound, as used in routine fetal monitoring by external cardiotocography, might stimulate fetal activity was investigated. A mean increase in fetal activity of over 90% was found, as judged by the fetal movement count.
研究了用于常规胎儿监护的外监护多普勒超声可能刺激胎儿活动的可能性。根据胎动计数判断，发现胎儿活动平均增加超过90%。
