Detection of foetal heart action by ultrasound transformed into audible signals. A comparative study with visual method.
D001698:Biomedical Engineering; D005260:Female; D005318:Fetal Heart; D005865:Gestational Age; D006801:Humans; D008722:Methods; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis; D013997:Time Factors; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography