title: THE FETAL ELECTROCARDIOGRAM. II. MEASURING TECHNICS.
mesh_terms: D004562:Electrocardiography; D005260:Female; D005333:Fetus; D006801:Humans; D007231:Infant, Newborn; D009622:Noise; D011247:Pregnancy
keywords: ELECTROCARDIOGRAPHY; FETUS; INFANT, NEWBORN; NOISE; PREGNANCY