title: A combined Doppler-ECG system for recording fetal systolic time intervals.
mesh_terms: D004301:Doppler Effect; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D005316:Fetal Distress / Q000175:diagnosis; D005318:Fetal Heart / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D011247:Pregnancy; D013599:Systole