Cesarean Section: Indications, Contraindications, and Complications
Direct Answer
Cesarean section should only be performed when there is a clear medical or surgical indication, as it carries significantly higher maternal morbidity and mortality compared to vaginal delivery, with both immediate surgical risks and long-term complications affecting future pregnancies. 1
Indications for Cesarean Section
Absolute Indications (Medical/Surgical)
The most common evidence-based indications include:
- Labor dystocia (most frequent indication)
- Abnormal or indeterminate fetal heart rate tracing (fetal distress)
- Fetal malpresentation (breech, transverse lie)
- Multiple gestation (depending on presentation)
- Suspected fetal macrosomia with specific risk factors
- Prior uterine surgery with rupture risk
- Placental abnormalities (previa, abruption)
- Cord prolapse
- Failed progress of labor
- Obstructed labor 2, 3
Critical Caveat on Indications
Cesarean delivery without a medical or surgical indication should not be considered unless there has been comprehensive preadmission evaluation of harms and benefits for both the pregnant patient and their baby. 1 The 2026 ERAS guidelines emphasize that appropriate surgical indication is a traditional requirement before subjecting a patient to increased-risk surgery.
Recent data challenges historical definitions—contemporary labor progresses substantially slower than historically taught, meaning many "dystocia" diagnoses may be premature. 3 This represents a major pitfall: overdiagnosis of labor dystocia drives unnecessary cesarean sections.
Contraindications
There are no absolute contraindications to cesarean section when maternal or fetal life is threatened. However:
- Absence of medical indication is itself a relative contraindication given the risk profile
- Patient refusal after informed consent (though rare in true emergencies)
- The risk-benefit analysis must always favor cesarean over vaginal delivery for the procedure to be justified 1
Complications
Short-Term Maternal Complications
Immediate surgical risks include:
- Hemorrhage (major bleeding occurs in 1.2% of cases) 4
- Infection (most common complication):
- Visceral injuries:
- Thromboembolism (0.2%) 4
- Wound complications: dehiscence, hematoma (5% each) 2
- Anesthetic complications
Maternal mortality is 2.8 per 1,000 cesarean sections, significantly higher than vaginal delivery 4. Sepsis remains the major cause of death 5.
Long-Term Maternal Complications
Future pregnancy risks increase in dose-response manner:
- Uterine rupture in subsequent pregnancies 1, 6
- Abnormal placentation (placenta previa, accreta, percreta) 1, 6
- Ectopic pregnancy (increased risk) 6
- Stillbirth in subsequent pregnancies 6
- Preterm birth in future pregnancies 6
These risks accumulate with each subsequent cesarean section, creating a cascade effect for women desiring multiple children.
Neonatal and Childhood Effects
Short-term neonatal effects:
- Altered hormonal and bacterial exposures at birth
- Different immune system development
- Reduced intestinal microbiome diversity 6
Long-term childhood effects:
- Increased likelihood of allergy, atopy, and asthma
- Greater incidence of childhood obesity
- Altered immune development 6
The mechanisms involve disruption of normal physiological processes during birth, particularly affecting the developing neonatal microbiome.
Critical Clinical Pitfalls to Avoid
Premature diagnosis of labor dystocia: Use contemporary labor curves, not outdated definitions. Labor progresses slower than historically taught 3
Overinterpretation of fetal heart rate tracings: Standardized interpretation protocols reduce unnecessary cesarean sections 3
Failure to offer alternatives: External cephalic version for breech and trial of labor for twin gestations (first twin cephalic) can safely reduce cesarean rates 3
Inadequate informed consent: Patients must understand both immediate surgical risks AND long-term reproductive consequences 1
Ignoring non-medical interventions: Continuous labor support reduces cesarean rates without compromising outcomes 3
Risk Stratification Algorithm
Before proceeding with cesarean section, verify:
- Is there a clear medical/surgical indication? (If no → do not proceed without comprehensive counseling)
- Have alternatives been considered? (ECV for breech, labor support for dystocia, etc.)
- Has the patient been counseled on immediate risks? (infection, hemorrhage, organ injury)
- Has the patient been counseled on long-term risks? (uterine rupture, placental complications in future pregnancies)
- Do benefits clearly outweigh risks for THIS patient and THIS baby?
Only proceed if all five criteria are satisfied.