Fetal heart sound monitoring in high risk patients.
D000293:Adolescent; D000328:Adult; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis; D005318:Fetal Heart; D006326:Heart Auscultation; D006339:Heart Rate; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008991:Monitoring, Physiologic; D011247:Pregnancy; D014465:Ultrasonics