1925年 Peiper 报告置于母亲腹前数米远的汽车喇叭的呜叫可使胎儿活动增加,最近已能用超声影像术检查胎儿对强噪音的眨眼-惊跳反应,且已记录到子宫内听觉诱发电位。然而这些刺激-反应试验均需神经系统发育较完善,在妊娠26周前很难得出一致的结果,而此 In 1925, Peiper reported an increase in fetal activity due to a car horn whistling a few meters in front of the mother’s abdomen. Recently, it has been possible to detect a fetus’s blink-and-throbbing reaction to strong noises using ultrasound imaging and to record intrauterine hearing Evoked potentials. However, these stimulus-response tests require a well-developed nervous system that is hard to produce consistent results by 26 weeks of gestation