title: M-mode echocardiographic assessment between normal heart rate and bradycardia in one twin at 36 weeks gestation.
mesh_terms: D000328:Adult; D001919:Bradycardia / Q000175:diagnosis*; D004200:Diseases in Twins; D004452:Echocardiography; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D011247:Pregnancy; D014427:Twins