Cesarean Section — How It Works, Benefits & Recovery — Procedure Guide, Recovery & Risks | MyMedicPlus

A Cesarean section (C-section or lower segment cesarean section, LSCS) is the surgical delivery of a baby through incisions made in the mother's lower abdomen and uterus when vaginal delivery is not safe or is not possible. It is one of the most frequently performed major surgical procedures in the world, accounting for approximately 21% of all births globally according to WHO data, with rates ranging from below 10% in low-income countries to above 50% in some regions. The operation takes its name from the Roman lex cesarea governing the extraction of a living infant from a deceased mother, though the modern procedure is far removed from historical origins. Contemporary cesarean sections are planned procedures performed under regional anaesthesia (spinal or epidural block) with the mother awake and a partner present, or as emergency procedures when acute fetal or maternal compromise develops during labour. Enhanced recovery protocols have transformed post-operative care, with most women mobilising within 12–24 hours and breastfeeding within hours of delivery. The classification of cesarean urgency uses a four-category system: Category 1 (immediate threat to life), Category 2 (maternal or fetal compromise not immediately life-threatening), Category 3 (early delivery needed but no immediate compromise), and Category 4 (elective at a time to suit mother and team).

Absolute indications for cesarean section include major placenta praevia (placenta completely covering the cervical os), placenta accreta spectrum (placenta abnormally adherent to or invading the uterine wall), transverse or oblique fetal lie, brow presentation, and certain cases of cord prolapse. Common relative indications where cesarean offers safer delivery include fetal malpresentation (breech at term), failure to progress in the first or second stage of labour despite oxytocin augmentation, fetal distress evidenced by acute cardiotocography abnormalities, macrosomia in diabetic mothers, twin pregnancy with non-cephalic first twin, previous uterine rupture or classical cesarean uterine scar, active primary herpes simplex genital infection at onset of labour, and certain maternal conditions including severe cardiac disease, raised intracranial pressure, or spinal cord injury precluding Valsalva. Maternal request cesarean (patient choice in the absence of medical indication) is also performed in many healthcare systems following informed discussion of risks and benefits compared with vaginal birth.

The patient is positioned supine with a 15-degree left lateral tilt to displace the gravid uterus off the inferior vena cava and prevent aortocaval compression. Spinal anaesthesia — injection of local anaesthetic and opioid into the subarachnoid space — provides rapid onset motor and sensory block from the lower thorax downward; it is the anaesthetic of choice for elective procedures. Pre-existing epidural analgesia is topped up for emergency procedures. A Foley catheter is inserted after anaesthesia. A transverse Pfannenstiel incision is made 2–3 cm above the pubic symphysis through skin and subcutaneous fat, the anterior rectus sheath is opened transversely, the rectus muscles separated, and the peritoneum incised. The bladder is reflected inferiorly. A low transverse uterine incision is made in the lower uterine segment (avoiding the more vascular upper segment), the membranes are ruptured, and the baby's presenting part is elevated through the incision with gentle fundal pressure applied by an assistant. The cord is clamped and divided. Syntometrine or oxytocin is given intravenously and the placenta delivered by controlled cord traction. The uterine incision is repaired in one or two layers with absorbable sutures. The peritoneum, rectus sheath, and skin are closed in layers. The patient is positioned supine with a 15-degree left lateral tilt to prevent aortocaval compression. Spinal anaesthesia delivers local anaesthetic and opioid into the subarachnoid space, providing rapid-onset motor and sensory block from the chest downward. The abdomen is prepared with antiseptic solution and draped. A 15 cm transverse (Pfannenstiel or Joel-Cohen) incision is made 2–3 cm above the symphysis pubis through skin and subcutaneous fat. The rectus sheath is incised transversely and the rectus muscles separated in the midline. The peritoneum is entered bluntly or sharply. A transverse incision is made in the lower uterine segment (lower segment caesarean section — LSCS), extended laterally by blunt finger dissection. The baby is delivered by fundal pressure, or by forceps if the head is engaged deeply. The cord is clamped and cut, and oxytocin administered intravenously to stimulate uterine contraction. The placenta is delivered by controlled cord traction. The uterine incision is repaired in two layers with absorbable sutures, the peritoneum left open or closed, rectus sheath repaired, and subcutaneous tissue and skin closed. Total operative time is 30–60 minutes.

When indicated, cesarean section is a life-saving procedure for both mother and baby. For fetal malpresentation, placenta praevia, or acute fetal distress, it averts catastrophic outcomes — neonatal death, severe birth asphyxia, and uterine rupture — that would otherwise occur with attempted vaginal delivery. Planned cesarean delivery for breech presentation reduces composite neonatal mortality and serious morbidity compared with planned vaginal breech birth, as demonstrated by the Term Breech Trial (Hannah et al., Lancet 2000). For mothers with active genital herpes at term, cesarean prevents neonatal herpes infection, which carries a 30% mortality risk. Elective cesarean at 39 weeks or beyond in appropriate candidates avoids the unpredictability of labour, reduces perinatal asphyxia risk compared with post-dates delivery, and allows preparation of family and support structures. For women with severe tocophobia (fear of childbirth), planned cesarean with psychological support has been shown to significantly improve maternal mental health outcomes. In settings with appropriate surgical capability and post-operative support, maternal mortality from planned cesarean is below 0.05%, comparable to vaginal delivery at high resource settings.

Cesarean section carries higher short-term maternal morbidity than uncomplicated vaginal delivery. Major complications include primary postpartum haemorrhage requiring transfusion (2–3%), wound infection (5–10%), endometritis, deep vein thrombosis and pulmonary embolism (risk mitigated by early mobilisation, hydration, compression stockings, and low-molecular-weight heparin prophylaxis), urinary tract injury (bladder injury 0.1–0.3%, ureteral injury rare), bowel injury, and adhesion formation that may complicate future surgery. Neonatal risks from planned cesarean include transient tachypnoea of the newborn (wet lung, due to absence of the thoracic squeeze of vaginal delivery), occurring in 2–3% at 37–38 weeks and rare at 39+ weeks. The most significant long-term complication is the increased risk of abnormal placentation (placenta praevia, accreta, percreta) in subsequent pregnancies — the risk of accreta spectrum rises from 0.3% with no prior cesarean to 3% with one prior, 11% with two, and 40% with four or more prior cesareans. Anaesthetic complications from spinal block include hypotension (common, managed with phenylephrine infusion), post-dural puncture headache (1–2%), and rare high spinal or total spinal block.

Most women are mobilised within 12–24 hours of surgery with assistance, and the urinary catheter is removed at 12–24 hours post-operatively. Pain management uses a multimodal approach: regular paracetamol and NSAIDs (ibuprofen or diclofenac if not contraindicated), wound infiltration with local anaesthetic, and intrathecal morphine administered at the time of spinal anaesthesia providing 12–24 hours of post-operative analgesia. Hospital stay is typically 2–4 days. Mothers are encouraged to breastfeed from the recovery room whenever possible. Skin-to-skin contact with the baby in the operating theatre ('gentle cesarean' or 'family-centred cesarean') is increasingly practised to facilitate bonding. Driving is contraindicated until the woman can perform an emergency stop without pain — typically 6 weeks. Returning to strenuous exercise should await 8–12 weeks and clinical clearance. The uterine and abdominal wall scar achieves 80% of original tensile strength by 6 weeks and is generally fully healed at 3 months. Sexual intercourse may resume when comfortable, typically after 6–8 weeks. A postnatal check at 6 weeks reviews the scar, contraception, and mental health.