multi class comparison

FHR Deceleration Comparison: Early vs Late vs Variable — Shape, Cause, Intervention

The NCLEX shows you a fetal heart rate tracing and asks what to do next. Picking the wrong deceleration type means calling a benign head-compression pattern ominous — or worse, ignoring uteroplacental insufficiency that's starving the fetus of oxygen. Shape, timing, and cause each point to a different intervention.

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Comparison

Side-by-side3 compared
Comparevs
Dimension
Early Decelerations
Late Decelerations
Variable Decelerations
Cause / mechanism
  • Fetal head compression against cervix
  • ★Uteroplacental insufficiency then ↓ O₂
  • ★Umbilical cord compression
Shape & timing on tracing
  • Gradual U
  • mirrors the contraction exactly
  • Onset to nadir ≥ 30 sec
  • Gradual U
  • nadir AFTER contraction peak
  • Delayed recovery
  • shifted right
  • Abrupt V/W
  • no relation to contraction
  • Onset to nadir < 30 sec
Significance
  • Benign
  • normal physiologic response
  • OMINOUS — fetal hypoxemia
  • Concerning if repetitive or losing variability
Nursing intervention
  • None needed
  • continue monitoring
  • ★Reposition left lateral
  • IV bolus
  • O₂
  • STOP oxytocin immediately
  • Reposition (side-lying, knee-chest)
  • Amnioinfusion may be ordered
Notify provider — escalate
  • No — document, routine care
  • Notify immediately
  • prep for possible cesarean
  • Yes if recurrent, prolonged > 60 s, or slow return
Associated conditions
  • Active labor
  • fetal head engagement
  • Post-dates, preeclampsia, abruption, hypotension
  • Oligohydramnios
  • cord prolapse
  • 2nd stage
Cause / mechanism

Early Decelerations

  • Fetal head compression against cervix

Late Decelerations

  • ★Uteroplacental insufficiency then ↓ O₂
Shape & timing on tracing

Early Decelerations

  • Gradual U
  • mirrors the contraction exactly
  • Onset to nadir ≥ 30 sec

Late Decelerations

  • Gradual U
  • nadir AFTER contraction peak
  • Delayed recovery
  • shifted right
Significance

Early Decelerations

  • Benign
  • normal physiologic response

Late Decelerations

  • OMINOUS — fetal hypoxemia
Nursing intervention

Early Decelerations

  • None needed
  • continue monitoring

Late Decelerations

  • ★Reposition left lateral
  • IV bolus
  • O₂
  • STOP oxytocin immediately
Notify provider — escalate

Early Decelerations

  • No — document, routine care

Late Decelerations

  • Notify immediately
  • prep for possible cesarean
Associated conditions

Early Decelerations

  • Active labor
  • fetal head engagement

Late Decelerations

  • Post-dates, preeclampsia, abruption, hypotension

★ marks the fact that sets a column apart.

Clinical Pearl

Early = Head = benign. Late = Placenta = ominous, stop pit. Variable = Cord = reposition.

Component Topics

FHR Accelerations & Early DecelerationsFHR Variable Decelerations — Recognition & ResponseFHR Late Decelerations

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