Instrumentation of fetal heart rate and fetal electrocardiography. II. A vaginal electrode.
D004562:Electrocardiography; D004566:Electrodes; D005260:Female; D005318:Fetal Heart; D006340:Heart Rate, Fetal; D006801:Humans; D011247:Pregnancy; D014621:Vagina
ELECTROCARDIOGRAPHY; FETAL HEART