[Heart action of the fetus at various periods of uncomplicated pregnancy].
D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D010701:Phonocardiography; D011247:Pregnancy / Q000502:physiology*; D013997:Time Factors
Serdechnaia deiatel'nost' u ploda v razlichnye sroki neoslozhnennoĭ beremennosti.