Doppler ultrasound in obstetrics.
D001805:Blood Transfusion, Intrauterine; D005260:Female; D005313:Fetal Death / Q000175:diagnosis; D005318:Fetal Heart / Q000502:physiology; D005865:Gestational Age; D006801:Humans; D007743:Labor, Obstetric; D008722:Methods; D010923:Placenta Previa / Q000175:diagnosis; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011258:Pregnancy Tests; D011272:Pregnancy, Multiple; D014463:Ultrasonography