Labor Lens presents information neutrally. Choices belong to you and your care team.
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What is it
Sensors held against the abdomen (external) or a small electrode on the baby's scalp (internal) record the heart rate alongside contractions.
How your body works here
The baby's heart rate is regulated by the autonomic nervous system, which is very sensitive to oxygen delivery through the placenta. Each contraction briefly squeezes the placental vessels; a well-oxygenated baby shows short accelerations and a variable baseline. Persistent late decelerations, minimal variability, or bradycardia can signal that oxygen delivery is being compromised. Continuous EFM tracks that pattern in real time; intermittent auscultation samples it.
Benefits (B)
- Captures every heartbeat continuously.Review sources ↓
- Standard during certain inductions, with Pitocin, after epidural, or in higher-risk situations.Review sources ↓
Risks (R)
- Limits mobility (though wireless options exist).Review sources ↓
- Has not been shown to reduce stillbirth or cerebral palsy in low-risk labors and may increase cesarean rates in those cases.Review sources ↓
Alternatives (A)
- Intermittent auscultation (Doppler or fetoscope at intervals) — appropriate for many low-risk labors.Review sources ↓
- Wireless or waterproof monitoring where available.Review sources ↓
Evidence summary
Major guidelines (ACOG, NICE) support intermittent auscultation as appropriate for low-risk labors. Continuous monitoring is recommended in specific clinical situations.
Sources
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Questions to ask your provider
- Given my situation, is intermittent monitoring an option?
- Are wireless or waterproof monitors available?
Intuition & Nothing/Wait (the I and N in BRAIN)
What is your gut telling you? What happens if you do nothing or wait?
Add to my birth plan
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This is a personal preference, not a decision. Final choices happen in conversation with your care team.
After you talk it through
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