Studies in fetal well-being: variations in fetal heart rate.
D004562:Electrocardiography; D005260:Female; D005333:Fetus / Q000502:physiology*; D006337:Heart Murmurs; D006340:Heart Rate, Fetal; D006347:Heart Sounds; D011247:Pregnancy
CARDIAC MURMURS AND SOUNDS; ELECTROCARDIOGRAPHY; FETUS/physiology