Labor Lensby LlaMamma

Continuous Electronic Fetal Monitoring (EFM)

Two belts on the belly — one for the baby's heart rate, one for contractions — recording continuously so the team can review the pattern over time. Standard for high-risk labors and after most interventions (Pitocin, epidural, VBAC).

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What it is

Continuous EFM uses two external transducers strapped around the abdomen: a Doppler ultrasound for fetal heart rate and a tocodynamometer ("toco") for contraction timing. The strip is printed and shown on a central monitor at the nurses' station. It's routine in most U.S. hospitals for high-risk pregnancies (induction, prior cesarean, preeclampsia, IUGR, meconium, twins) and after epidural or Pitocin, but it's not required for all low-risk labor — intermittent auscultation is an evidence-based alternative for uncomplicated labor. Modern reviews show continuous EFM increases cesarean and operative vaginal births without reducing overall newborn outcomes in low-risk labor.

Evidence review links

Each link opens the full review on the publisher's site in a new tab.

Possible benefits

  • Real-time picture of how the baby is tolerating labor — especially useful with Pitocin, epidural, prior cesarean, or high-risk conditions[ACOG↗]
  • Reduces the rare complication of neonatal seizures compared to intermittent auscultation[Cochrane↗]
  • Documented strip lets the team catch trends (falling variability, late decelerations) over time[ACOG↗]

Possible risks

  • Increases the cesarean and operative vaginal birth rate without improving cerebral palsy or overall newborn outcomes in low-risk labor[Cochrane↗][ACOG↗]
  • Restricts movement with corded external monitors — position changes and hydrotherapy get harder[Evidence Based Birth↗]
  • High rate of "Category II" (indeterminate) tracings that can be interpreted many ways[ACOG↗]
  • The strip is a snapshot of oxygenation, not a direct measure of baby's wellbeing[ACOG↗]

Alternatives

Run BRAIN with Labor LensGet Benefits, Risks, Alternatives, Intuition, and Nothing/Wait for Continuous Electronic Fetal Monitoring (EFM) — plus questions for your care team.

Current evidence

The 2017 Cochrane review of continuous EFM vs. IA found continuous EFM roughly halved neonatal seizures but increased cesarean and instrumental birth rates and did not reduce cerebral palsy or perinatal death. ACOG Practice Bulletin 106 recognizes both continuous EFM and IA as acceptable in low-risk labor.

Where the evidence is clear · where people may choose differently

For most topics, guidelines from ACOG, WHO, and other major bodies broadly agree on the core safety points (when to act in an emergency, informed-consent standards, monitoring baselines). Where reasonable people — and even guidelines — differ tends to be around thresholds (when to start or stop something), preferences (comfort, environment, support), and values (how you weigh small risks against benefits). Use the questions below to explore those pieces with your care team.

Educational only. Your care team can help you weigh what applies to your specific situation.

Related evidence topics

Questions to ask your care team

  • ?Am I 'low risk' enough for intermittent auscultation, or is continuous EFM medically indicated?
  • ?If we do continuous EFM, is wireless / telemetry available so I can walk and change positions?
  • ?What category is my tracing right now, and what would move you to change the plan?
  • ?If the tracing looks Category II, what do we try before moving to cesarean?

Universal questions (works for any decision)

A short BRAIN-style set you can bring to any conversation about interventions, monitoring, or care decisions.

  • ?Why are you recommending this now — is it urgent, routine, or optional?
  • ?What happens if we wait an hour (or longer) before deciding?
  • ?What signs would tell us this is working — or that we need to change course?
  • ?What are the alternatives, including doing nothing?
  • ?What would you recommend if this were your family?
  • ?What would change your recommendation?

Sources & provenance

Tap a source to open the original guideline or review in a new tab.

Plain-language paraphrase. Re-verify before publish.

Last reviewed: 2026-07-03

Further reading — canonical references

Read the source material directly. Each link opens the publisher's own current guidance in a new tab — cross-check what we summarize against what they say.

Educational only. Guidelines evolve — the linked publisher pages will reflect newer guidance than any static snapshot.

Version history — v1.0.0

  • v1.0.0 · 2026-07-03 · LlaMamma editors

    Initial continuous EFM topic.

New guidance from ACOG, WHO, Evidence Based Birth, or other listed sources is recorded here and can be updated remotely without a new app release.