title: Baseline in human fetal heart-rate records.
abstract: Large variations in the pattern of normal fetal heart-rate traces near term are described. The presence of flat or bimodal frequency distributions of pulse intervals in these traces complicates the derivation of a baseline by statistical methods. A system is described for deriving an appropriate baseline from which accelerations or decelerations may be measured.
mesh_terms: D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005865:Gestational Age; D006339:Heart Rate; D006801:Humans; D011247:Pregnancy; D012016:Reference Values; D014463:Ultrasonography