[Identification of fetal heart sounds with the aid of protoveratrine].
D005318:Fetal Heart; D005333:Fetus / Q000502:physiology*; D006347:Heart Sounds; D011526:Protoveratrines; D014703:Veratrum / Q000628:therapy*; D014704:Veratrum Alkaloids
D011526:Protoveratrines; D014704:Veratrum Alkaloids
FETUS/physiology; HEART SOUNDS; VERATRUM/therapy