Multipolar registration of the fetal electrocardiogram: technic and comparison with bipolar method.
D004562:Electrocardiography / Q000295:instrumentation; D005260:Female; D005313:Fetal Death / Q000175:diagnosis*; D005318:Fetal Heart / Q000502:physiology*; D005865:Gestational Age; D006801:Humans; D008722:Methods; D011247:Pregnancy; D011272:Pregnancy, Multiple / Q000502:physiology*