[Recording of fetal respiratory movements based on studying the shifting of the amniotic fluid in the trachea by the Doppler effect].

Examination of 80 women in their third trimester with chronic fetal abnormalities has shown that movement of the amniotic fluid in the fetal trachea can be detected during fetal respirations. The pattern of amniotic fluid velocity is significantly affected by chronic fetal stress. Evaluation of pneumodopplerographic findings enables identification of 90% of satisfactory and 80% of poor fetal conditions.