title: Detection of a live fetus in cattle using Doppler-ultrasound.
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D005260:Female; D005318:Fetal Heart / Q000502:physiology; D005328:Fetal Viability; D011247:Pregnancy; D011674:Pulse; D014463:Ultrasonography