[CLINICAL STUDIES ON FETAL ELECTROCARDIOGRAMS IN PREGNANCY RECORDED  THROUGH THE ABDOMINAL WALL].
D034861:Abdominal Wall; D035843:Biomedical Research; D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart; D006801:Humans; D011247:Pregnancy
ELECTROCARDIOGRAPHY; FETAL HEART; PREGNANCY