[CLINICAL USE OF THE POLYCARDIOGRAPHIC METHOD IN THE DIAGNOSIS OF MULTIPLE PREGNANCY].
D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart; D006801:Humans; D010701:Phonocardiography; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins
ELECTROCARDIOGRAPHY; FETAL HEART; PHONOCARDIOGRAPHY; PREGNANCY; PREGNANCY, MULTIPLE; TWINS