FETAL ELECTROCARDIOGRAPHY.
D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart; D006801:Humans; D007746:Labor Presentation; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins
ELECTROCARDIOGRAPHY; FETAL HEART; LABOR PRESENTATION; PREGNANCY; PREGNANCY, MULTIPLE; TWINS