title: Alterations of systolic time intervals during pregnancy.
mesh_terms: D000293:Adolescent; D000328:Adult; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D010701:Phonocardiography; D049590:Postpartum Period; D011187:Posture; D011247:Pregnancy; D013997:Time Factors