Detection of the foetal pulse using the ultrasonic Doppler technique.
D005260:Female; D005318:Fetal Heart / Q000502:physiology; D006801:Humans; D007743:Labor, Obstetric; D010920:Placenta; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011674:Pulse; D013997:Time Factors; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography