title: Placental localisation using the Doppler portable ultrasonic apparatus.
mesh_terms: D000328:Adult; D002585:Cesarean Section; D003951:Diagnostic Errors; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D010923:Placenta Previa / Q000175:diagnosis*; D011247:Pregnancy; D014463:Ultrasonography