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OverviewAetiologyPathophysiologyClinical features and red flagsInvestigationsDifferential diagnosisManagementComplicationsMonitoring and follow-upSpecial situationsCommon pitfallsQuestionsSources
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Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.

Uterine rupture

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

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Suspected rupture requires immediate laparotomy

An abnormal fetal trace with persistent pain, shock or loss of station in a labouring woman with a uterine scar may signal rupture.

Action: Call the obstetric, anaesthetic, neonatal and major haemorrhage teams, stop oxytocin, begin ABC resuscitation and prepare immediate laparotomy and birth. Do not await imaging confirmation.

Overview

Identify rupture even when the classic features are incomplete, initiate haemorrhage resuscitation, and arrange immediate surgical control and birth.

Uterine rupture is disruption through the uterine wall, with potential loss of the normal barrier between the uterine cavity and peritoneal space. It differs from scar dehiscence, in which the serosal covering remains intact and an incomplete scar defect may be found incidentally. The symptomatic emergency threatens the mother through haemorrhage and the fetus through separation from placental circulation or expulsion from the uterine cavity.

Previous caesarean or other full-thickness uterine surgery is the major clinical context in UK practice, but rupture is possible in an unscarred uterus. Most planned vaginal births after a single lower-segment caesarean proceed safely. Antenatal counselling should therefore explain both the small absolute risk and the reason for continuous intrapartum monitoring with immediate surgical access, rather than treating every scar as an impending rupture.

Key points

  • The most consistent intrapartum feature is an abnormal CTG.
  • The full triad of pain, vaginal bleeding and fetal heart abnormalities is often absent.
  • Rupture can cause substantial concealed haemorrhage with little visible vaginal bleeding.
  • Stop uterine stimulation and activate surgical and transfusion support immediately.

Aetiology

01

Uterine scar

Previous caesarean and operations entering the uterine cavity can leave a mechanically vulnerable area. Classical scars and previous rupture have different future labour implications from an uncomplicated lower-segment scar.

02

Stress during labour

Induction or augmentation, obstructed labour and excessive uterine activity can increase stress on the uterine wall. The risk depends on the scar and clinical context, so senior planning matters.

03

Unscarred uterine rupture

Rupture without previous surgery is uncommon but can occur, including in difficult or obstructed labour and after trauma. Absence of a scar must not override an otherwise convincing emergency presentation.

Pathophysiology

  1. 1
    Wall disruption and bleeding

    A tear may injure uterine vessels and bleed into the abdominal cavity or broad ligament. Concealed loss explains why shock can exceed the apparent vaginal blood loss.

  2. 2
    Placental circulation failure

    Separation of the placenta or displacement of the fetus through a full-thickness defect can abruptly impair fetal oxygen delivery. Fetal heart abnormalities may precede obvious maternal decompensation.

  3. 3
    Secondary coagulopathy

    Extensive blood loss, hypoperfusion and replacement without adequate haemostatic support can worsen clotting failure. Definitive surgical control and physiologically guided resuscitation must proceed together.

Clinical features and red flags

Fetal change may lead the presentation

Persistent bradycardia or another marked CTG abnormality can be the earliest important sign. A trace change in scarred labour warrants direct maternal assessment and review of uterine activity, progress and pain, with no requirement for a complete textbook constellation.

Pain and analgesia pattern

Severe abdominal pain persisting between contractions, acute scar tenderness or repeated requests for epidural top-ups can raise concern. Effective regional analgesia does not prevent recognition through other signs, and epidural analgesia itself is not contraindicated for planned VBAC.

Haemorrhage and altered anatomy

Maternal tachycardia, hypotension, fainting, abnormal vaginal bleeding, haematuria or recession of the presenting part can accompany rupture. Reduced contractions and a change in abdominal contour add concern. External bleeding may underestimate loss into the abdomen or broad ligament.

Post-birth presentation

Occasionally rupture is recognised after vaginal birth through persistent bleeding, pain, circulatory deterioration or failure to recover. Repeatedly treating presumed uterine atony while ignoring abdominal findings can delay recognition of an extrauterine source.

Red flags requiring action

  • Sudden fetal bradycardia during labour after previous caesarean is a major warning sign even without severe pain.
  • Persistent pain between contractions, new scar tenderness or an unexpectedly increasing epidural analgesia requirement needs urgent assessment.

Investigations

  1. 01
    Immediate clinical examination and continuous CTGFirst step
    Why
    Recognise the emergency and establish the urgency of surgical birth.
    Interpretation and limitations
    Integrate fetal condition with maternal observations, abdominal findings, contraction pattern and station. Clinical suspicion sufficient to justify surgery should not be diluted by waiting for every recognised feature to appear.
  2. 02
    Full blood count, coagulation studies and fibrinogen
    Why
    Assess evolving haemorrhage and guide haemostatic replacement during treatment.
    Interpretation and limitations
    A haemoglobin value taken early may underestimate acute blood loss. Repeat results and trends are more useful than a single apparently normal measurement when the woman is deteriorating.
  3. 03
    Crossmatch and urgent blood-bank communication
    Why
    Secure appropriate blood components without delaying haemorrhage resuscitation.
    Interpretation and limitations
    State obstetric major haemorrhage and the clinical urgency. The laboratory determines emergency-release products and subsequent compatibility support; complete identity checks remain essential under pressure.
  4. 04
    Blood gas, lactate and ionised calcium
    Why
    Evaluate perfusion and complications of major bleeding and transfusion.
    Interpretation and limitations
    Rising lactate or acidosis supports inadequate oxygen delivery. Monitor calcium, temperature and coagulation during large-volume replacement, and treat abnormalities as the source is controlled.

Differential diagnosis

01

Placental abruption

Pain, fetal compromise and concealed haemorrhage overlap with rupture. A tender tense uterus supports abruption, but distinguishing the exact diagnosis must not delay intervention in a severely compromised woman or fetus.

02

Cord prolapse

An acute fetal heart abnormality after membrane rupture may reflect cord compression rather than wall disruption. Prompt vaginal examination can identify prolapse and allow immediate decompression during birth preparation.

03

Neuraxial hypotension

A maternal blood-pressure fall after epidural or spinal intervention can reduce placental perfusion. Its timing and response to treatment are informative, while persistent abdominal signs require another explanation.

Management

01RecognitionDeclare a surgical emergencyFirst stepRupture is suspected from fetal compromise or maternal findings during or after labour.+
  1. 1Summon senior obstetric and anaesthetic staff, theatre, neonatal clinicians and blood-bank support with a clear suspected diagnosis.
  2. 2DefinitiveStop oxytocin or other ongoing uterine stimulation and move immediately towards definitive surgical management.
  3. 3Assess airway, breathing and circulation, give oxygen when indicated by critical illness, and obtain large-bore intravenous access with urgent blood samples.
  4. 4Activate the major haemorrhage protocol when bleeding or shock is present; restore perfusion while the surgical team prepares birth and source control.
02Definitive controlLaparotomy and haemostasisDefinitiveClinical suspicion requires exploration or the woman has

Complications

01

Severe maternal haemorrhage

Major blood loss may lead to organ hypoperfusion, coagulopathy, intensive care admission or death. Transfusion support cannot substitute for closing or removing the bleeding source.

02

Loss of reproductive capacity

Hysterectomy may be necessary when repair cannot safely control bleeding. This consequence requires sensitive explanation and follow-up, alongside recognition that emergency treatment prioritised survival.

03

Fetal hypoxic injury

The fetus may suffer severe acidosis, neurological injury or death after interruption of placental support. A skilled newborn team should be present for delivery and subsequent assessment.

Monitoring and follow-up

  • Follow haemodynamics, bleeding, urine output and perfusion closely during transfer, surgery and recovery; a transiently adequate blood pressure can mask ongoing loss.
  • Repeat blood counts, coagulation, fibrinogen and blood gases according to bleeding severity and treatment response, with haematology input for persistent abnormalities.
  • Observe for urinary leakage, haematuria, abdominal distension or continuing pain that may indicate associated injury or further bleeding.
  • Reassess venous thromboembolism prevention once haemostasis is secure, taking recent surgery, immobility, bleeding and neuraxial procedures into account.

Special situations

Absence of a classic triad is expected

Clinical cases frequently lack simultaneous pain, bleeding and CTG abnormalities. The purpose of surveillance is to act on a concerning evolving pattern, not to withhold escalation until a diagnostic checklist is complete.

Risk is conditional on the labour context

RCOG describes approximately a one-in-two-hundred rupture risk with planned VBAC overall and higher risk with induced or augmented labour than spontaneous VBAC labour. Individual counselling also depends on scar type, previous vaginal birth and operative history.

Dehiscence and complete rupture differ

An incidental thin or incomplete scar defect does not carry the same immediate physiological consequences as a full-thickness tear with haemorrhage. Use operative descriptions accurately so later counselling is based on what actually occurred.

Hysterectomy can be the life-saving endpoint

Fertility-preserving repair is valuable when safe, but the ability to control haemorrhage and the woman's condition determine the operation. Early explicit discussion within the senior team helps prevent delay after repeated failed attempts.

Common pitfalls

  1. 01

    Assuming an epidural makes rupture impossible to diagnose overlooks CTG abnormalities, shock, altered station and changing analgesia requirements.

  2. 02

    Treating loss of contractions as reassuring progress can miss disruption of the uterine wall.

  3. 03

    Waiting for a fall in haemoglobin before activating major haemorrhage support can postpone treatment of severe acute loss.

  4. 04

    Presenting one time interval from an observational study as a safe waiting threshold misrepresents the need for immediate intervention.

Practice

Two practice questions

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Question 1 of 2
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Obstetrics and gynaecologyOriginal SBA

An incomplete clinical picture

During oxytocin-augmented VBAC, a woman develops fetal bradycardia, new haematuria and recession of the presenting part. Her epidural is effective and she reports little pain. What is the most appropriate management?

Choose one answer, then submit
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Sources and review status4 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: birth after previous caesarean information
  • RCOG: maternal collapse in pregnancy and the puerperium
  • NICE NG192: emergency caesarean principles

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

Authoring stateComplete draftClinical stateAwaiting reviewJurisdictionUnited Kingdom
Ultrasound or laboratory results must not delay laparotomy when clinical suspicion is strong.
  • Repair or hysterectomy depends on the tear, bleeding, tissue condition and maternal stability.
  • A previous rupture requires specialist future-pregnancy planning and is a contraindication to planned VBAC.
    • Loss of station, haematuria, abdominal contour change or maternal shock suggests a serious breach of the uterine wall.
  • 05
    Operative assessment of uterus and adjacent structures
    Why
    Confirm the tear and define definitive haemorrhage control.
    Interpretation and limitations
    Laparotomy establishes the extent of rupture and associated bladder or vascular injury. Surgical findings guide repair, additional specialist assistance or hysterectomy; bedside imaging must not delay this in an unstable presentation.
    • haemodynamic instability
    .
    +
    1. 1Proceed to urgent laparotomy and delivery if the fetus is undelivered; do not wait for an ultrasound report or normalised physiology.
    2. 2Inspect the rupture, control bleeding and assess bladder, broad ligament and adjacent structures, requesting appropriate surgical help.
    3. 3Choose uterine repair when technically appropriate and haemostasis achievable; perform hysterectomy when required to save life rather than persisting with ineffective conservative attempts.
    4. 4Continue guided component replacement and management of hypothermia, hypocalcaemia and coagulopathy throughout surgery.
    03RecoveryExplain findings and plan follow-upBleeding is controlled and mother and newborn have entered recovery.+
    1. 1Provide high-dependency or intensive care according to organ dysfunction, transfusion burden and ongoing support needs.
    2. 2Explain the operative findings and whether the uterus was repaired or removed, allowing time for questions as the woman recovers.
    3. 3Document the exact rupture site and repair for future clinicians, and arrange senior counselling before or early in any subsequent pregnancy.
    4. 4Coordinate neonatal outcome discussion, psychological support and follow-up for anaemia, infection or urinary tract injury.
    Key medicines and prescribing safety1 treatment · regimens, roles and cautions+
    Provides antimicrobial cover around urgent laparotomy and repair or hysterectomy.

    Perioperative intravenous antibiotics

    Use the emergency obstetric surgical regimen selected locally, with the exact drug and dose adjusted for allergy, weight, renal function and suspected contamination.

    Prophylaxis and treatment of established infection have different duration requirements. Record what was administered and reassess the need for ongoing therapy after operative findings and recovery are known.