title: Three-tier versus five-tier fetal heart rate classification systems.
authors.forename: David A
authors.initials: DA
authors.lastname: Miller
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Miller
mesh_terms: D000138:Acidosis / Q000175:diagnosis*; D005260:Female; D005323:Fetal Monitoring / Q000379:methods*; D006340:Heart Rate, Fetal / Q000502:physiology*; D006801:Humans; D011247:Pregnancy