title: [Evidence of biorhythmic organization of the fetal heart rate. Technic of prolonged electrocardiographic recording].
mesh_terms: D000204:Activity Cycles; D002940:Circadian Rhythm; D004562:Electrocardiography / Q000379:methods*; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005323:Fetal Monitoring / Q000379:methods*; D006339:Heart Rate; D006801:Humans; D011247:Pregnancy
vernacular_title: Evidencia de organización biorrítmica de la frecuencia cardíaca fetal. Técnica de registro electrocardiográfico prolongado.