II. Definition

  1. Fetal Heart Rate under 110 bpm

III. Mild Fetal Bradycardia (Fetal Heart Rate 100-110 bpm)

  1. Benign if adequate variability and no decelerations
  2. Other causes
    1. Post-term infant
    2. Occiput PosteriorFetal Position

IV. Transient Fetal Bradycardia (FHR < 100 bpm)

  1. Fetal Heart Block or other conduction defects
  2. Maternal Systemic Lupus Erythematosus
  3. Congenital Heart Disease

V. Prolonged Fetal Bradycardia (FHR < 100 bpm)

  1. Severe Fetal Hypoxia

VI. References

  1. Bailey (2000) ALSO, E:1-13
  2. Gabbe (2002) Obstetrics, p. 395
  3. Rylander (2001) Clin Fam Pract 3(2):287-305 [PubMed]

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