title: [Characteristics of the frequency spectrum of the fetal electrocardiogram].
mesh_terms: D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005323:Fetal Monitoring / Q000379:methods*; D006339:Heart Rate; D006801:Humans; D011247:Pregnancy
vernacular_title: Características del espectro de frecuencia del electrocardiograma fetal.