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Educational draft · awaiting clinical reviewUse Rapid for revision, not patient-care decisions. Check current national and local guidance and the BNF or BNFC before acting.

Vaginal birth after caesarean

Obstetrics and gynaecology · UK scope · Sources checked 7 Sept 2026 · Clinical review pending

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Possible uterine rupture during labour

An abnormal fetal heart pattern, particularly a prolonged deceleration or bradycardia, may be the earliest sign of rupture. Persistent abdominal pain, new bleeding, loss of station, haematuria or maternal instability increase concern but may be absent.

Action: Call the obstetric emergency team, stop oxytocin if running, begin maternal resuscitation and prepare immediate operative birth when rupture is suspected. Do not wait for a complete symptom triad or diagnostic imaging.

Synopsis

Counsel about birth after a previous caesarean, select an appropriate planned pathway and recognise intrapartum findings that require urgent assessment for uterine rupture.

  • Most people with one previous lower-segment caesarean and an uncomplicated singleton cephalic pregnancy can consider planned vaginal birth.
  • Establish the uterine incision and previous operative findings from records; the abdominal skin scar does not identify the uterine scar.
  • RCOG quotes planned vaginal birth success around 72–75%, rising to approximately 85–90% after a previous vaginal birth.
  • Discuss an approximate uterine rupture risk of one in 200 with planned vaginal birth, explaining that individual circumstances modify this estimate.
  • Plan labour where continuous fetal monitoring, immediate caesarean birth, blood transfusion and advanced neonatal resuscitation are available.
  • Previous classical incision or uterine rupture, and other contraindications to vaginal birth, usually require an alternative planned route.
  • Induction or augmentation changes the risk discussion and requires a senior, explicitly documented plan for method, monitoring and progress.

Key red flags

A sudden persistent fetal bradycardia during labour with a uterine scar requires urgent assessment for rupture and other acute events.

Severe pain between contractions, unexpected breakthrough pain or a rapidly increasing analgesic requirement needs obstetric reassessment.

Loss of fetal station, haematuria or new vaginal bleeding may indicate scar disruption even before major maternal haemodynamic changes.

Tachycardia, hypotension or collapse can reflect concealed intra-abdominal bleeding and should not be reassured by limited visible vaginal loss.

Investigation priorities

01
Previous obstetric and operative recordsFirst step

Identify scar characteristics, prior complications and the reason for the earlier caesarean.

Management branches

Antenatal decisionCompare realistic birth pathways

A person with a previous caesarean is considering how to give birth again.

  1. Review previous surgery and current pregnancy factors, then discuss the likely benefits, risks and recovery of planned VBAC and planned repeat caesarean.
  2. Explain approximate success and rupture figures with their limitations, giving particular weight to prior vaginal births, the original indication and any need for induction.
  3. Agree the planned setting and route, record the person's priorities and provide accessible written information that can be revisited.
  4. Document contingencies for early labour, membrane rupture and pregnancy beyond the agreed review point; if repeat caesarean is selected, normally arrange it from 39 weeks unless earlier birth is indicated.

Key medicines

Oxytocin when augmentation is agreedUse only the consultant-agreed, pump-controlled intravenous regimen for labour with a uterine scar, documenting starting rate, increments, maximum rate and stopping criteria rather than importing a routine unscarred-uterus prescription.Induction and augmentation increase rupture risk. Continuous CTG and contraction assessment are essential; reduce or stop stimulation for excessive contractions and stop immediately for suspected rupture or significant fetal deterioration. The exact product and local scar-specific protocol require reconciliation.
Epidural labour analgesiaThe anaesthetist selects and titrates the local anaesthetic and opioid regimen to provide effective labour analgesia, considering previous doses and the patient's medical and haemodynamic status.Epidural analgesia is not contraindicated by planned VBAC. New breakthrough pain, focal pain between contractions or an escalating top-up requirement requires obstetric assessment as well as checking block function; do not assume every new pain represents a technical failure.
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Sources and review status5 sources · checked 7 Sept 2026 · clinical review pending+
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 7 Sept 2026; clinical approval remains outstanding.

  • RCOG Green-top 45 Birth after previous caesarean
  • RCOG Patient information on birth after caesarean
  • NICE NG192 Caesarean birth and previous caesarean
  • NICE NG207 Induction after previous caesarean
  • NICE NG229 Fetal monitoring during labour

Editorial contact: Doctor’s Passport editorial team. Source-check date is separate from clinical approval. Report a content problem · Content changes

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom