Result: Pure tone and ABR waveforms were abnormal in 20 subjects (21 ears), moreover acoustic stapedius reflex and the vestibular function were abnormal in 19 subjects.
结果：20例(21耳)纯音测听、听觉诱发电位均异常，19例镫骨肌声反射及前庭功能异常。
2
The acoustic stimulation reflex was safe and reliable. Whether hearing is abnormal in those fetus whose acoustic stimulation is negative should be further traced and observed.