用三种超声方法观察２５例孕妇的胎儿有或无呼吸样运动（Ｆ８Ｍ）。Ｂ型观察胎儿躯干，脉冲多普勒观察脐静脉，彩色多普勒观察鼻咽部，敏感性分别为１００％、１００％、９６％，特异性均为１００％，呼吸时间百分比分别为４９．６％、４８．７％、４６．９％。窒息时间分别为１７０±１２１ｓ、１７１±１３２ｓ、１７０±１２９ｓ。结果表明三种超声方法是评价产前胎儿ＦＢＭ的实用方法且可互相替代。 Twenty-five pregnant women with or without breath-like exercise (F8M) were observed with three sonographic methods. B type observation of fetal torso, pulse Doppler umbilical vein observation, color Doppler nasopharyngeal nasopharyngeal observation, the sensitivity was 100%, 100%, 96%, specificity was 100%, respiratory percentage were 49. 6%, 48.7%, 46.9%. Suffocation time were 170 ± 121s, 171 ± 132s, 170 ± 129s. The results show that three kinds of ultrasound is a practical method to evaluate prenatal fetal FBM and can replace each other.