title: A simple method for continuous recording of fetal systolic time interval.
mesh_terms: D004301:Doppler Effect; D004452:Echocardiography / Q000295:instrumentation*; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005323:Fetal Monitoring / Q000295:instrumentation / Q000379:methods*; D006339:Heart Rate; D006801:Humans; D011247:Pregnancy