Pregnancy / Postpartum · Emergency
Maternal Sepsis — Warning Signs & Emergency Care
Sepsis in pregnancy or postpartum (up to 6 weeks after birth) is a leading cause of maternal death. SEPSIS mnemonic + Sepsis Six bundle. Postpartum risk peaks days 1-7. Recognition + antibiotics within 1 hour saves lives. NICE NG51 / MBRRACE-UK.
Last reviewed 2 June 2026
Maternal sepsis (Sepsis-3 + obstetric)
omqSOFA + 1-hour bundle
omqSOFA = 0 / 3
Low risk at this assessment
Troubleshooting + common pitfalls
- Pitfall: Using non-obstetric qSOFA thresholds.
Solution: Pregnancy physiology: HR ~ 10–15 bpm higher, BP ~ 10–15 mmHg lower, RR slightly raised. SOMANZ omqSOFA uses SBP ≤ 90 (vs < 100) and RR ≥ 25 (vs ≥ 22). Apply pregnancy-adjusted thresholds or you miss early sepsis. - Pitfall: Delayed antibiotics waiting for cultures.
Solution: Cultures DO NOT delay antibiotics — both within the first hour. Antibiotic delay > 1 hour each adds ~7 % mortality (Kumar 2006 CCM). - Pitfall: Missing chorioamnionitis as the source.
Solution: Maternal tachycardia + fever ≥ 38°C + fetal tachycardia + uterine tenderness + foul lochia = strong suggestion. Delivery is often part of source control if intrapartum chorio. - Pitfall: Under-fluid resuscitating from fear of pulmonary oedema.
Solution: 30 mL/kg crystalloid in the first 3 hours unless overt heart failure or severe PE features — under-resuscitation is more common and more dangerous than over-resuscitation in early sepsis. - Pitfall: Choosing pregnancy-incompatible antibiotic.
Solution: Piperacillin-tazobactam, ceftriaxone, gentamicin, clindamycin, metronidazole, aciclovir all pregnancy-compatible. AVOID tetracyclines, fluoroquinolones (relatively), aminoglycosides > 3 days (ototoxicity). - Pitfall: Forgetting toxic shock syndrome (TSS) / Group A Strep.
Solution: Sudden-onset severe sepsis postpartum with rash, hypotension, multi-organ involvement — add CLINDAMYCIN 900 mg IV q8h (suppresses exotoxin production) + IVIG. GAS killed Ignaz Semmelweis’s patients in 1840s and still kills women today. - Pitfall: Source control deferred.
Solution: Septic abortion needs uterine evacuation FAST. Chorioamnionitis at term → deliver. Postpartum endometritis with retained products → ERPC. Mastitis abscess → drain. Antibiotics alone won’t fix an undrained source. - Pitfall: Maternal vs fetal priority confusion.
Solution: Treat the mother. In-utero resuscitation of the maternal circulation (fluids, O2, position, vasopressors) is the BEST thing you can do for the fetus. Premature operative delivery for ambiguous fetal indications in unstable maternal sepsis often worsens both outcomes. - Pitfall: Not measuring lactate.
Solution: Initial lactate predicts mortality independently of qSOFA. Lactate ≥ 2 amber, ≥ 4 red. Repeat at 2–4 hours; clearance > 10 % per hour = adequate resuscitation. - Pitfall: Missing influenza / COVID / varicella as viral sepsis.
Solution: Pregnancy × severe respiratory viral infection = exceptionally high mortality. Test, isolate, treat with appropriate antivirals (oseltamivir for influenza, remdesivir/paxlovid for COVID per current era guidance, aciclovir for varicella). - Pitfall: Pyelonephritis under-recognised severity.
Solution: Pregnant women with pyelonephritis have higher ARDS and sepsis-shock rates. Routine admission for IV antibiotics until afebrile 24–48 h, then oral; daily urine culture. - Pitfall: Postpartum “tired and unwell” written off.
Solution: Maternal mortality from sepsis frequently follows a “not herself / not coping” presentation at discharge or community. Low threshold for reassessment; community midwife + GP escalation pathway. - Pitfall: No follow-up plan for “possible sepsis” amber-tier.
Solution: Re-assess every 30 minutes; trend lactate, qSOFA, vitals. Most amber cases declare themselves within 2 hours — either improve with empirical fluids/antibiotic or progress to red — rapid reassessment catches this.
Educational tool only — not medical advice. WHO 2017; Surviving Sepsis Campaign 2021; SOMANZ 2017; ACOG/SMFM Sepsis Consensus 2019. Decisions and prescriptions by obstetric / critical-care teams.
What does this mean?
Maternal sepsis remains a leading direct cause of pregnancy-related mortality globally. The WHO 2017 definition — “life-threatening organ dysfunction from infection” in pregnancy, intrapartum, postabortion, or up to 42 days postpartum — mirrors Sepsis-3 but is operationalised through obstetrically-adjusted qSOFA (omqSOFA): altered mentation, SBP ≤ 90, RR ≥ 25. Two or more → activate the Sepsis-1-hour bundle. The key implementation lesson from MBRRACE-UK reports is antibiotic timing: each hour of delay after recognition adds ~7 % mortality (Kumar 2006). Cultures DO NOT delay antibiotics — both go in within the first hour. Use pregnancy-compatible broad-spectrum cover (piperacillin-tazobactam ± gentamicin ± clindamycin for toxic-shock / Group A Strep) and respect obstetric source control: chorioamnionitis often needs delivery; septic abortion needs evacuation; mastitis abscess needs drainage. The most common conceptual error is treating maternal sepsis with fetal-first thinking — in unstable maternal sepsis, treating the mother (fluids, vasopressors, maternal circulation, source control) IS the best fetal resuscitation. Premature operative delivery in an unstable mother often worsens both outcomes. Pregnancy-specific differentials: chorioamnionitis, endometritis, septic abortion, mastitis ± abscess, pyelonephritis (frequently severe), influenza / COVID / varicella viral sepsis. The postpartum “not herself” presentation at community discharge is a recurring missed-diagnosis story — community midwifery and GP escalation pathways save lives.
Why is sepsis serious in pregnancy / postpartum?
Sepsis is the body’s overwhelming response to infection causing organ damage. Can be fatal.
Pregnancy + postpartum at higher risk. UK MBRRACE reports sepsis is one of leading causes of maternal death. Mortality 1-3% if treated early; rises sharply with delay.
Risk peaks postpartum days 1-7, especially after C-section.
SEPSIS warning signs mnemonic
- Slurred speech / confusion.
- Extreme shivering / muscle pain.
- Passing no urine in a day.
- Severe breathlessness.
- It feels like you’re going to die.
- Skin mottled, discoloured, very pale, blue.
Also:
- High fever (>38.5°C) or low temperature (<36°C).
- Fast heart rate (>100/min).
- Fast breathing (>20/min).
- Low blood pressure.
- Offensive-smelling discharge.
- Severe abdominal pain.
- Foul-smelling lochia.
Any of these in pregnancy or postpartum (up to 6 weeks): today’s emergency.
Postpartum sepsis sources
- Endometritis — womb infection (common after retained placenta, C-section).
- Wound infection — C-section, episiotomy, tear.
- UTI / pyelonephritis.
- Mastitis / breast abscess.
- Respiratory — chest infection, COVID, flu.
- Group A Strep — severe; community-acquired.
C-section women: 5-10x higher endometritis risk vs vaginal birth. Prophylactic antibiotics at C-section reduce this.
The Sepsis Six bundle (first hour)
- Oxygen — target SpO2 ≥94%.
- Blood cultures before antibiotics.
- IV antibiotics within 1 hour.
- IV fluids — crystalloid 30 mL/kg over 3h.
- Lactate measurement.
- Urine output monitoring (catheter usually).
Each hour delay increases mortality. NICE NG51 / NHS sepsis pathway.
Antibiotics used
- Piperacillin-tazobactam (Tazocin) — common first-line.
- Co-amoxiclav ± metronidazole.
- Cefuroxime ± metronidazole + gentamicin.
- Meropenem if severe.
- Flucloxacillin + clindamycin for soft tissue / mastitis.
IV initially → oral switch when stable + afebrile 48h. Duration 7-14 days. Most safe in breastfeeding.
ICU?
~10-20% of maternal sepsis needs ICU. Indications:
- Septic shock.
- Multi-organ failure.
- Need for vasopressors.
- Mechanical ventilation.
Recovery usually good if recognised early. Postpartum separation from baby distressing — milk expression with hospital pump, family support, photos to bedside.
Breastfeeding during sepsis
Usually yes — most antibiotics safe. If too unwell to feed, express regularly (hospital pump available); store + freeze for later. Partner / family deliver to baby.
Metronidazole: temporary feeding pause for 12-24h after dose sometimes advised. Check each drug.
Long-term recovery
Post-sepsis syndrome common:
- Physical fatigue for weeks-months.
- Muscle weakness.
- Hair loss (telogen effluvium, 2-4 months later).
- Concentration issues.
- Mood changes.
- Anxiety about future health.
- PTSD (~30% of ICU survivors).
Mental health support essential — perinatal mental health team referral. UK Sepsis Trust: sepsistrust.org.
Different scenarios — maternal sepsis
Scenario 1: Day 4 postpartum, fever 39, foul lochia, abdominal pain
Endometritis pattern. Hospital. IV antibiotics within 1h. Pelvic US for retained products.
Scenario 2: Day 7 post-C-section, wound red, spreading, pus
Wound infection. A&E. Swab. IV antibiotics. Surgical debridement if collection.
Scenario 3: 28 weeks pregnant, fever 38.5, urine cloudy + smelly
Pyelonephritis (kidney infection). Hospital. IV antibiotics. Hydration. Watch for preterm labour.
Scenario 4: 5 days postpartum, breast red + hot + fever, baby fed normally
Mastitis. Continue breastfeeding affected breast. Flucloxacillin oral. Cool compresses. Recheck 48h — if not improving, A&E for breast abscess assessment.
Scenario 5: Severe sepsis postpartum, ICU 5 days
Hospital pump milk expression. Family deliver to baby. After discharge: gradual recovery; mental health support; UK Sepsis Trust resources.
Care guidance — maternal sepsis
- Don’t dismiss feeling unwell postpartum.
- SEPSIS mnemonic: any warning sign = today’s emergency.
- Postpartum first 6 weeks: vigilance.
- C-section wound: watch for spreading redness, pus, fever.
- Mastitis: continue feeding; flucloxacillin.
- Vaccines: flu, COVID, pertussis up-to-date.
- Handwashing: self + visitors.
- Sepsis Six: within 1 hour saves lives.
- Breastfeeding usually continues.
- Mental health support post-recovery.
- UK Sepsis Trust for survivor support.
Sources
- NICE NG51. Sepsis: recognition, diagnosis and early management.
- RCOG Green-top Guideline 64. Bacterial sepsis in pregnancy + following pregnancy.
- MBRRACE-UK. Saving Lives, Improving Mothers’ Care.
- UK Sepsis Trust. sepsistrust.org.
- SOMANZ. Omqsofa criteria for obstetric sepsis 2017.
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Frequently asked questions
Why is sepsis serious in pregnancy / postpartum?
SEPSIS = body's overwhelming response to infection causing organ damage. Can be FATAL. PREGNANCY + POSTPARTUM at HIGHER RISK because immune system altered + invasive procedures (vaginal exams, catheters, C-sections, sweeps) introduce bacteria. UK MBRRACE reports: SEPSIS one of leading causes of maternal death. EARLY recognition critical. RISK PEAKS: postpartum days 1-7 (especially after C-section). MORTALITY: 1-3% if treated early; rises sharply with delay. Sepsis is a MEDICAL EMERGENCY — ' GOLDEN HOUR' antibiotics save lives.
What are sepsis warning signs?
MNEMONIC 'SEPSIS': S - Slurred speech / confusion; E - Extreme shivering / muscle pain; P - Passing no urine in a day; S - Severe breathlessness; I - It feels like you're going to die; S - Skin mottled, discoloured, very pale, blue. ALSO: HIGH FEVER (>38.5°C) or LOW temperature (<36°C); FAST HEART RATE (>100/min); FAST BREATHING (>20/min); LOW BLOOD PRESSURE; OFFENSIVE-SMELLING discharge; severe abdominal pain; FOUL-smelling lochia; NOT FEELING RIGHT. ANY one of these in pregnancy or POSTPARTUM (up to 6 weeks after): TODAY'S emergency.
When is postpartum sepsis most likely?
FIRST 6 WEEKS POSTPARTUM. PEAK risk: days 1-7. SOURCES: (1) ENDOMETRITIS — womb infection (common after retained placenta, prolonged labour, C-section); (2) WOUND infection (C-section, episiotomy, tear); (3) UTI / pyelonephritis (kidney); (4) MASTITIS / breast abscess; (5) RESPIRATORY (chest infection, COVID, flu); (6) GROUP A STREP (severe — community-acquired). C-SECTION women: 5-10x higher endometritis risk vs vaginal birth. PROPHYLACTIC antibiotics at C-section reduce.
What does the team check for?
(1) BP, HEART RATE, RESPIRATORY RATE, TEMPERATURE (NEWS2 / MEOWS score); (2) URINE OUTPUT; (3) CONFUSION level; (4) BLOOD TESTS: FBC (white cells), CRP (inflammation), LFTs (liver), U&E (kidney), LACTATE (tissue oxygenation), BLOOD CULTURES (find the bug); (5) URINE: dipstick + culture; (6) HIGH VAGINAL + cervical swabs; (7) WOUND swabs if applicable; (8) CHEST X-RAY if respiratory; (9) ULTRASOUND for collections / retained products. SEPSIS-6 BUNDLE: oxygen, IV fluids, blood cultures, antibiotics (within 1 HOUR), lactate, urine output monitoring.
What's the 'sepsis six' bundle?
SIX INTERVENTIONS done within FIRST HOUR of suspected sepsis: (1) OXYGEN — high flow, target SpO2 ≥94%; (2) BLOOD CULTURES — drawn before antibiotics; (3) IV ANTIBIOTICS — within 1 hour, broad spectrum; (4) IV FLUIDS — crystalloid 30 mL/kg over 3 hours; (5) LACTATE — measure (high = tissue not getting enough oxygen); (6) URINE OUTPUT monitoring — catheter often inserted. SAVES LIVES — each hour delay increases mortality. NICE NG51 / NHS sepsis pathway. STAFF have screens / algorithms — TRUST the process even if you feel awful.
What antibiotics will I get?
BROAD SPECTRUM initially — covers most likely bacteria. UK CHOICES: (1) PIPERACILLIN-TAZOBACTAM (Tazocin) — common first-line; (2) CO-AMOXICLAV ± metronidazole; (3) Cefuroxime ± metronidazole + gentamicin (acute); (4) IF SEPSIS SEVERE: meropenem; (5) MASTITIS / SOFT TISSUE: flucloxacillin + clindamycin. AFTER CULTURE RESULTS (48-72 hours): targeted antibiotic. DURATION 7-14 days typically. ROUTE: IV initially → oral switch when stable, eating, afebrile 48h. SAFE in breastfeeding: most antibiotics fine; check specific drug. RARELY: stop breastfeeding for specific drugs.
Will I need ICU?
DEPENDS on severity. MOST sepsis cases manageable on maternity ward / HDU. ICU INDICATIONS: (1) Septic shock (BP not responding to fluids); (2) Multi-organ failure; (3) Need for vasopressors (BP-raising drips); (4) Mechanical ventilation; (5) Severe respiratory compromise. STATISTICS: ~10-20% of maternal sepsis needs ICU. RECOVERY USUALLY good if recognised early. POSTPARTUM RECOVERY in ICU: separation from baby distressing — milk expression with hospital pump, photos to bedside, family support help bonding. SUPPORT for partner essential during this time.
Can I still breastfeed during sepsis?
USUALLY YES. Most antibiotics safe in breastfeeding. IF you're WELL ENOUGH to feed: continue — supports recovery + baby bonding + reduces engorgement. IF SEPARATED (you in HDU/ICU): EXPRESS milk regularly (hospital pump available); store + freeze for later; partner / family deliver to baby. SOME DRUGS not compatible — switch if possible. METRONIDAZOLE: temporary feeding pause for 12-24h after dose sometimes advised. EVERY DRUG: check with team. ESTABLISHED supply: protect with pumping every 2-3h.
Why do I need a catheter?
MONITORS URINE OUTPUT — key sign of sepsis severity. HEALTHY: ≥30 mL/hour, ≥0.5 mL/kg/hour. SEPSIS reduces kidney perfusion → less urine. STRICT monitoring guides treatment. CATHETER also: helps mobilise; prevents bladder distension during illness; allows accurate fluid balance. INSERTED in sterile conditions; usually 24-48 hours; removed when stable. SOME DISCOMFORT but worth it. RISKS: UTI; minimised by good hygiene, prompt removal.
How long do I stay in hospital?
VARIES: MILD: 3-5 days (IV antibiotics 24-48h then oral). MODERATE: 5-7 days. SEVERE: 7-14 days, possibly ICU 2-5 days. HOSPITAL UNTIL: fever resolved 48h; clinical improvement; can eat + walk; oral antibiotics tolerated. EARLY DISCHARGE possible with OPAT (Outpatient Parenteral Antibiotic Therapy) — IV antibiotics at home with district nurse. SLOWER RECOVERY than expected — full physical recovery 4-8 WEEKS. RETURN to GP / midwife for any concerns: persistent fever, wound issues, breathing difficulty.
What's the long-term recovery like?
POST-SEPSIS SYNDROME common: PHYSICAL FATIGUE for weeks-months; MUSCLE WEAKNESS; HAIR LOSS (telogen effluvium, 2-4 months later); CONCENTRATION issues; MOOD changes. PSYCHOLOGICAL: ANXIETY about future health; PTSD (~30% of ICU survivors); fear of next pregnancy. MENTAL HEALTH support essential — perinatal mental health team referral. PHYSICAL: gradual exercise; nutrition; sleep when possible. SUPPORT: UK Sepsis Trust — sepsistrust.org; survivor support; advice for families. NEXT PREGNANCY: discuss with consultant; not contraindicated; preconception planning.
Could I have prevented this?
USUALLY NO — sepsis often not predictable. BUT: HANDWASHING for self and visitors; VACCINATIONS up-to-date (flu, COVID, pertussis); WOUND care after C-section / episiotomy (gentle washing, dry, watch for spreading redness, pus, fever); SEEK HELP EARLY for any infection (UTI, mastitis, wound issue); DON'T DISMISS feeling unwell; INFLUENZA/COVID vaccine in pregnancy reduces respiratory sepsis. NOT YOUR FAULT — biology / chance. EARLY RECOGNITION + treatment = best outcomes.
What about my baby if I'm in hospital?
PRACTICAL options depending on setup: (1) BABY rooming-in with mum if both well enough; (2) FAMILY caring for baby with mum visiting; (3) PARTNER taking primary care, milk expression / formula. ICU: baby usually NOT allowed in (infection control); photos, video calls. EMOTIONAL impact significant — counselling support; mother-baby psychology services. ATTACHMENT: develops over time; brief separation rarely causes long-term issues; FOCUS on getting well so you can return to caring for baby. PARTNER experience also traumatic — support them.
Will sepsis affect next pregnancy?
USUALLY NO. SEPSIS itself doesn't impair fertility or future pregnancy outcomes. RECOVERY essential: ensure underlying issue (e.g. retained placenta, immune dysfunction) resolved. PRECONCEPTION: discuss with consultant; address underlying causes; mental health check; nutritional optimisation. NEXT PREGNANCY: standard care + vigilance for infection; some women find anxiety high — perinatal mental health support. STRUCTURAL ISSUES (Asherman's syndrome, scarring) rare but possible — investigate if subfertility next time.
What about my partner / family during this time?
TRAUMATIC for them too. WATCHING partner critically ill is one of life's worst experiences. SUPPORT: hospital chaplains, social workers, mental health teams. INFORMATION SHARING: ICU teams give regular updates; ask for daily briefing time. PRACTICAL HELP: childcare for other children; food deliveries; work leave; bills. FAMILY meetings to discuss prognosis if severe. POST-DISCHARGE: partner often delayed PTSD; counselling helpful. MARRIAGE / RELATIONSHIP stresses common — recognised + supported.
How does this relate to other calculators on BumpBites?
Companion: /calculators/meows for early warning score; /calculators/preeclampsia-diagnosis (overlap symptoms); /calculators/hellp-classifier; /calculators/lochia-tracker for postpartum bleeding; /calculators/postpartum-mood-warning; /calculators/pph-qbl for haemorrhage; /calculators/gbs-prophylaxis.