What it is
IA means a nurse or midwife listens for 30–60 seconds during and after a contraction on a schedule (roughly every 15–30 minutes in active labor, every 5–15 minutes while pushing). It's the ACOG- and ACNM-endorsed alternative to continuous EFM for people in uncomplicated labor with no risk factors. If any concerning finding shows up, the team switches to continuous EFM. IA takes 1:1 nursing attention, so ask whether your hospital / birth center actually staffs for it.
Evidence review links
Each link opens the full review on the publisher's site in a new tab.
- ACOG Practice Bulletin 106: Intrapartum Fetal Heart Rate MonitoringACOG
- Continuous cardiotocography (CTG) as a form of electronic fetal monitoring for fetal assessment during labour (Cochrane 2017)Cochrane
- Evidence on: Fetal MonitoringEvidence Based Birth
- ACNM Position Statement: Intermittent Auscultation for Intrapartum Fetal Heart Rate SurveillanceAmerican College of Nurse-Midwives
Possible benefits
- Freedom to walk, shower, change positions, and use hydrotherapy — all of which help labor progress and coping[Evidence Based Birth↗][American College of Nurse-Midwives↗]
- Same safety as continuous EFM in low-risk labor without the extra cesarean and operative vaginal birth risk[Cochrane↗]
- Focused 1:1 attention from a nurse or midwife during each check[American College of Nurse-Midwives↗]
Possible risks
- Only appropriate for uncomplicated labor — if you have Pitocin, epidural, VBAC, meconium, high blood pressure, or IUGR, continuous EFM is standard[ACOG↗]
- Slightly higher rate of neonatal seizures compared to continuous EFM (though not higher cerebral palsy or death)[Cochrane↗]
- Requires a nurse or midwife who is trained in IA and available at the right intervals — not all units staff for it[American College of Nurse-Midwives↗]
Alternatives
- Continuous external EFM (belts) — most common U.S. default[ACOG↗]
- Wireless / telemetry EFM — continuous data but you can still walk and shower[Evidence Based Birth↗]
- Ask for IA + continuous EFM as backup: IA in early labor with a plan to switch if anything concerning appears[American College of Nurse-Midwives↗]
Current evidence
ACOG Practice Bulletin 106 and ACNM both endorse IA as safe and appropriate for low-risk labor. The Cochrane 2017 review supports IA outcomes matching continuous EFM in every measure except a small increase in neonatal seizures.
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
- 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).
- Fetal Monitoring Methods (EFM, IA, Scalp Electrode)Ways to check the baby's heart rate in labor — continuous belt monitors, intermittent listening, or a small clip on the baby's scalp when a signal is hard to get.
- Wireless / Telemetry Fetal MonitoringThe same continuous EFM data as the corded belts, but sent to the nurses' station wirelessly — so you can walk the halls, use the shower or tub, and change positions freely.
- Movement & Position in LaborFreedom to move, change positions, and use upright postures during labor.
Questions to ask your care team
- ?Am I a candidate for IA — no Pitocin, no epidural, no risk factors right now?
- ?How often will you listen, and for how long each time?
- ?What finding would move us to continuous EFM — and do we have wireless available if it does?
- ?Do you have staffing to actually do IA today?
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.
- ACOG Practice Bulletin 106: Intrapartum Fetal Heart Rate Monitoring — ACOG
- Continuous cardiotocography (CTG) as a form of electronic fetal monitoring for fetal assessment during labour (Cochrane 2017) — Cochrane
- Evidence on: Fetal Monitoring — Evidence Based Birth
- ACNM Position Statement: Intermittent Auscultation for Intrapartum Fetal Heart Rate Surveillance — American College of Nurse-Midwives
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.
Tier 1 · Clinical guidelines
Tier 2 · Systematic reviews
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 intermittent auscultation 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.