Doppler ultrasonic fetal heart monitoring during labor: comparison with an internal monitoring technic.
D004452:Echocardiography; D005069:Evaluation Studies as Topic; D005260:Female; D005318:Fetal Heart; D006801:Humans; D007743:Labor, Obstetric; D008991:Monitoring, Physiologic; D011247:Pregnancy; D014463:Ultrasonography