title: [Evolution of main cardiac sounds in the fetus].
mesh_terms: D000328:Adult; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005865:Gestational Age; D006326:Heart Auscultation; D006801:Humans; D010701:Phonocardiography
vernacular_title: Ewolucja tonów głównych serca płodu.