title: Effect of acute hypoxia on human fetal heart rate. The significance of increased heart rate variability.
abstract: The fetal heart rate response to acute hypoxemia was observed during an accidental drop in oxygen concentration inspired by the mother in labor. There was a marked increase in FHR variability in the early stage of hypoxia and also during the recovery phase. While an increase in fetal heart variability is generally considered to be a normal physiological event, it may also indicate a state of fetal hypoxemia associated with an intact fetal circulation, and should be treated with caution during labor.
mesh_terms: D000328:Adult; D000769:Anesthesia, Inhalation; D000773:Anesthesia, Obstetrical; D005260:Female; D005318:Fetal Heart / Q000503:physiopathology*; D005311:Fetal Hypoxia / Q000503:physiopathology*; D006339:Heart Rate; D006801:Humans; D007231:Infant, Newborn; D009609:Nitrous Oxide; D010100:Oxygen; D011247:Pregnancy; D014590:Uterine Contraction
chemical_list: D009609:Nitrous Oxide; D010100:Oxygen