title: Ultradian rhythms in the human fetus during the last ten weeks of gestation: a review.
mesh_terms: D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005323:Fetal Monitoring; D005333:Fetus / Q000502:physiology*; D006339:Heart Rate; D006801:Humans; D009068:Movement; D010507:Periodicity; D011247:Pregnancy; D011263:Pregnancy Trimester, Third; D012119:Respiration; D013057:Spectrum Analysis