[RESEARCH ON THE ELECTROPHONOCARDIOGRAM OF THE FETUS AND THE NEWBORN].
D004562:Electrocardiography; D005318:Fetal Heart; D005333:Fetus; D006801:Humans; D007231:Infant, Newborn; D010701:Phonocardiography; D012106:Research
ELECTROCARDIOGRAPHY; FETAL HEART; INFANT, NEWBORN; PHONOCARDIOGRAPHY