title: [Determination of fetal heart action in early pregnancy using ultrasonics (A-picture-method)].
mesh_terms: D004452:Echocardiography; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy
vernacular_title: Der Nachweis der fetalen Herzaktion in der Frühschwangerschaft mittels Ultraschall (A-Bildverfahren.