Educational draft · awaiting clinical reviewThe full textbook explains uncertainty but does not replace live national or local guidance, specialist advice, or current prescribing information.
Caesarean birth indications and consent
Obstetrics and gynaecology · UK scope · Sources checked 7 Sept 2026 · Clinical review pending
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Recognise an immediate threat
Suspected uterine rupture, persistent fetal bradycardia, major abruption or cord prolapse can require category 1 caesarean birth. Resuscitation, theatre preparation and communication proceed together.
Action: Call senior obstetric, anaesthetic, theatre and neonatal staff, treat reversible causes immediately and arrange birth as soon as possible according to the maternal and fetal condition.
Purpose and principles
Choose and explain caesarean birth using the clinical indication, urgency, individual preferences and a practical plan for safe surgery and recovery.
Caesarean birth delivers the baby through abdominal and uterine incisions. The decision weighs the consequences of continuing pregnancy or attempting vaginal birth against the immediate and future effects of surgery. Placenta covering the cervical opening, persistent transverse lie, some uterine scars and fetal or maternal compromise are examples in which operative birth may be appropriate. Breech presentation, a previous lower-segment caesarean and maternal request require individual conversation. A label such as large baby or slow labour is insufficient without assessment of the whole clinical picture and available alternatives.
Planning allows participation in decisions about anaesthesia, support, contact with the baby and recovery. Emergency surgery compresses the time available but does not remove the need to explain the problem and proposed action in understandable language. Consent is a continuing discussion rather than a signature obtained at one appointment. Explain why caesarean birth is recommended, what alternatives are reasonably available, which risks matter to this particular person and how future pregnancies may be affected.
Key points
Record the indication and urgency separately because the same underlying condition can present with different degrees of compromise.
Indications, selection and cautions
Define the actual indication
Distinguish a barrier to vaginal birth from a risk that can be managed through another pathway. Placenta praevia covering the os differs from a low placenta requiring further assessment, and a classical uterine incision differs from a previous uncomplicated lower-segment incision. Review original records where available.
Identify the degree of urgency
Category 1 indicates an immediate maternal or fetal threat; category 2 indicates compromise without an immediate threat to life. Category 3 means early birth is needed without current compromise, while category 4 is scheduled birth. Reassess if physiology or the fetal heart pattern changes during preparation.
Understand a maternal request
Ask about previous trauma, pain, loss of control, pelvic floor concerns and expectations without assuming one explanation. Offer discussions with an experienced midwife and obstetrician and, where appropriate, an anaesthetist. Severe fear or tokophobia warrants an offer of perinatal mental health support alongside continued discussion of birth options.
Recognise factors altering operative risk
Previous abdominal surgery, anaemia, obesity, placenta accreta spectrum, anticoagulant treatment and significant cardiac disease can change the team, location and preparation needed. These factors should prompt a tailored plan rather than a generic risk list that obscures the most relevant issues.
Red flags requiring action
Persistent profound fetal bradycardia despite initial corrective measures requires immediate reassessment of the fastest safe route of birth.
Maternal collapse, heavy bleeding or suspected uterine rupture needs simultaneous resuscitation and emergency operative planning.
Assessment before treatment
01Full blood countFirst step
Why
Identify anaemia and assess the platelet count before operative birth.
Interpretation and limitations
Treat antenatal anaemia when time allows and use haemoglobin, symptoms and anticipated blood loss to plan support. Interpret platelet abnormalities with their cause and trajectory, particularly when neuraxial anaesthesia or a hypertensive disorder is relevant.
02Blood group and antibody screen
Why
Establish transfusion compatibility and identify antibodies that may delay blood provision.
Interpretation and limitations
NICE recommends grouping, antibody screening and saving serum. Routine cross-matching for every uncomplicated operation is unnecessary; arrange cross-matched blood when bleeding risk, antibodies or the clinical situation justify it.
03Targeted placental and fetal assessment
Why
Clarify placental position, presentation and suspected abnormal placental invasion when indicated.
Interpretation and limitations
Review antenatal imaging and investigate suspected accreta spectrum through the specialist pathway. Routine ultrasound solely to locate the placenta before every caesarean is unnecessary. For uncomplicated breech, confirm presentation by ultrasound as late as practicable before surgery.
04Anaesthetic and medical assessment
Why
Assess airway, comorbidities, medicines, allergies and suitability for regional anaesthesia.
Treatment approach
01Planned birthPrepare an individual scheduled operationFirst stepCaesarean birth is agreed antenatally without a need for earlier urgent delivery.+
1Review the indication, discuss reasonable alternatives and record the person's priorities, material risks and agreement to the operation.
2Schedule birth from 39 weeks unless a specific maternal or fetal indication supports earlier delivery, and record what to do if labour starts beforehand.
3Arrange blood tests, anaesthetic assessment, antibiotic and thromboprophylaxis plans; involve specialist teams when bleeding or medical risk is increased.
4Confirm the clinical picture on admission and accommodate preferences for a companion, contact with the baby and communication during surgery where feasible.
02Unplanned birthMatch operative speed to the threatA new maternal or fetal concern makes caesarean birth the appropriate route.+
Regimens, contraindications and interactions
Current NICE intrapartum guidance recommends carbetocin to prevent postpartum haemorrhage after caesarean birth; caesarean guidance links to that recommendation.
Carbetocin for uterine atony prophylaxis
For caesarean under spinal or epidural anaesthesia, PABAL is given as 100 micrograms intravenously over one minute once, after the baby is born and preferably before placental delivery.
Do not repeat carbetocin or administer it before birth. PABAL contraindicates hepatic or renal disease, serious cardiovascular disorders and epilepsy. Persistent bleeding requires investigation and further appropriate therapy, not another carbetocin dose.
Reduces postoperative endometritis, wound infection and urinary infection after caesarean birth.
Pre-incision antibiotic prophylaxis
Administer the maternity surgical prophylaxis regimen intravenously before skin incision, choosing the specified agent and dose for allergy status, weight and renal function.
NICE advises against co-amoxiclav for pre-incision caesarean prophylaxis. Select the local regimen explicitly; treatment for infection and prophylaxis after assisted vaginal birth are different prescribing situations.
Combining suitable analgesic classes supports movement, infant care and recovery while reducing opioid requirements.
Postoperative multimodal analgesia
Offer regular paracetamol with a non-steroidal anti-inflammatory medicine unless contraindicated; prescribe the specific dose and any additional opioid according to the person's clinical circumstances.
Complications, monitoring and follow-up
After surgery, monitor haemodynamics, respiratory function, sedation, uterine tone and blood loss, adjusting observation frequency to anaesthesia and the clinical course.
Assess pain, nausea, urinary output and motor recovery; support oral intake and mobilisation when appropriate, and remove the urinary catheter according to the anaesthetic and postoperative plan.
Reassess thromboembolism risk and ensure chosen mechanical or pharmacological prophylaxis is prescribed, timed appropriately around neuraxial procedures and explained before discharge.
Inspect the wound and explain that fever, increasing abdominal pain, offensive discharge, heavy bleeding, calf symptoms or breathlessness require prompt assessment.
Offer a discussion of the birth and complications, provide an understandable operation summary and record the uterine incision's implications for future pregnancy.
Special situations
Urgency is dynamic
The category communicates the current threat and coordinates the team; it does not replace reassessment. Recovery of the fetal heart may permit a considered change, while new bleeding demands escalation. Record why the plan changes and communicate it directly.
Absolute risks need context
When using numerical risks, explain whether the figures describe planned procedures, emergency operations or both. Estimates covering all caesarean births can misrepresent an uncomplicated planned procedure. Prior surgery and intended future pregnancies also influence the relevant discussion.
Future placental disease matters
Additional uterine scars increase the complexity of later pregnancy and surgery, including the possibility of placenta praevia and accreta spectrum. Discuss this antenatally, particularly when several future pregnancies are planned, while recognising the immediate consequences of avoiding necessary surgery.
Respect during urgent care
Brief explanations of events, personnel and neonatal support can reduce confusion during a frightening birth. Revisit the indication and sequence calmly afterwards; unanswered questions and traumatic memories may persist despite apparently uncomplicated physical recovery.
Common pitfalls
01
Using the usual decision-to-birth interval as permission to delay when the maternal or fetal condition requires faster birth.
02
Treating a previous caesarean or breech presentation as a complete decision without assessing the specific circumstances.
03
Making acceptance of mental health treatment a prerequisite for respecting an informed request for caesarean birth.
04
Copying antibiotic or uterotonic prescriptions from another birth pathway without checking indication and product restrictions.
05
Discussing the skin scar while omitting surgical complications, recovery and consequences for later pregnancies.
Practice
Two practice questions
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Question 1 of 2
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Obstetrics and gynaecologyOriginal SBA
Classify current operative urgency
A woman requires caesarean birth because fetal monitoring remains concerning despite corrective measures. The senior obstetrician documents fetal compromise but no immediate threat to life. Which urgency and timing description best matches NICE guidance?
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.
Category 1 involves an immediate threat to life; category 2 involves compromise that is not immediately life-threatening.
Arrange category 1 birth as soon as possible, usually within 30 minutes; category 2 usually within 75 minutes.
Plan uncomplicated scheduled caesarean birth at or after 39 weeks to reduce neonatal respiratory morbidity.
Explore a maternal request sensitively, provide balanced information and support the informed choice after discussion.
Give surgical antibiotic prophylaxis before incision and assess thromboprophylaxis, anaesthesia, haemorrhage risk and postoperative analgesia.
A previous uterine scar with a low anterior placenta raises concern for placenta accreta spectrum and requires specialist planning.
New breathlessness, chest pain or unilateral leg swelling after caesarean birth warrants urgent assessment for venous thromboembolism.
Interpretation and limitations
The anaesthetist integrates examination with relevant results and anticoagulant timing. Coagulation testing is targeted to indications such as significant haemorrhage or suspected clotting disorders rather than ordered routinely.
1
State the immediate problem, assign an urgency category and communicate directly with obstetric, anaesthetic, theatre and neonatal staff.
2Resuscitate and address reversible causes while preparing surgery; check whether an imminent assisted vaginal birth offers a safer and faster route.
3Explain the recommendation and obtain consent as the situation permits, checking allergies, blood availability and important anaesthetic risks without avoidable delay.
4Deliver category 1 cases as soon as possible, in most situations within 30 minutes, and category 2 cases as soon as possible, generally within 75 minutes; respond to deterioration rather than waiting for that interval.
03Maternal choiceSupport a request after informed discussionA person requests caesarean birth without another established medical indication for surgery.+
1Explore the reasons for the request and provide balanced information about vaginal and caesarean birth, including recovery and later pregnancies.
2Offer suitable discussions about pain relief, continuity, place of birth and specialist mental health support for severe anxiety, respecting which options the person wishes to pursue.
3If caesarean remains the informed preference after discussion, support that choice and offer it within the obstetric unit.
4Record the discussions and a clear booking plan so that different clinicians can provide consistent care.
Review renal function, bleeding, gastrointestinal disease and allergies before an NSAID. Tailor opioids and monitoring to neuraxial medicines, sedation risk and breastfeeding; unexpectedly increasing pain needs clinical assessment.