Pregnancy / Postpartum · Monitoring
MEOWS — Maternal Early Warning Score
Observation chart used in pregnancy + postpartum to detect deterioration early. Pregnancy-adjusted thresholds (BP, HR, RR change normally). Triggers escalation for sepsis, PE, haemorrhage, PE. NICE NG51 / SOMANZ omqSOFA.
Last reviewed 2 June 2026
MEOWS — modified early obstetric warning score
Maternal vital-signs track and trigger
/min
%
°C
mmHg
mmHg
bpm
Conscious level (AVPU)
A=Alert · V=responds to Voice · P=responds to Pain · U=Unresponsive
Pain (postnatal / abdominal)
MEOWS trigger
Within normal limits
No trigger criteria met on this set of vitals. Continue routine MEOWS monitoring per local protocol (e.g. every 4 hours antepartum, every 30 min in early postnatal recovery).
0 red parameters · 0 yellow parameters
Educational tool only — not medical advice. MEOWS is a track-and-trigger system used in NHS maternity units; thresholds vary slightly by local protocol. The principles are universal — physiological deterioration in obstetric patients is often subtle and missed without structured monitoring. CEMACH and MBRRACE-UK confidential enquiries have repeatedly cited delayed escalation as a contributor to severe maternal morbidity and mortality.
What does this mean?
MEOWS arose from the UK Confidential Enquiry into Maternal Deaths (CEMACH 2007), which kept finding that women who died in maternity care had recorded but unactioned abnormal vital signs in the hours before collapse. Pregnant women compensate physiologically extremely well — heart rate and BP often look near-normal until decompensation, when changes can be sudden. MEOWS works because even one “red” parameter (or two “yellow”) on the same set of obs triggers a structured, time-bound escalation rather than relying on individual clinician judgement of “does this look bad?”. Singh 2012 validation showed sensitivity ~89 %, specificity ~79 % for morbidity. Similar US (MEWS) and obstetric-specific scores exist with similar principles. The chart is filled in for every set of observations; trends across time matter as much as single readings.
What is MEOWS?
Modified Early Obstetric Warning Score — observation chart during pregnancy + postpartum. Adapted from adult NEWS2 but adjusted for pregnancy physiology.
6 parameters: respiratory rate, oxygen saturation, temperature, systolic BP, heart rate, consciousness level.
Why pregnancy-adjusted?
- HR rises ~10-15 bpm.
- BP drops 10-15 mmHg mid-trimester.
- RR rises slightly.
- SpO2 target slightly lower.
Adult thresholds would miss early deterioration or trigger false alarms.
When used
- Antenatal admissions.
- During labour if concerning observation.
- Postnatally 24-48h minimum.
- Any maternal illness in pregnancy / postpartum 6 wk.
Escalation triggers
- Any yellow score: midwife review + recheck.
- Any red score: immediate senior review.
- Two+ yellow scores: urgent senior review.
- Sepsis suspicion: sepsis bundle triggered.
Conditions MEOWS catches
- Maternal sepsis (biggest reason).
- Pre-eclampsia.
- Haemorrhage.
- Pulmonary embolism.
- Amniotic fluid embolism (rare).
- Cardiac events.
- General infections.
- Pre-eclamptic signs.
Frequency of observations
Postpartum:
- Immediate (1-2h): every 15-30 min.
- First 6h: hourly-2-hourly.
- First 24h: 4-hourly minimum.
- Ongoing: condition-dependent.
Postpartum red flags — come back
- Fever >38°C.
- Heavy bleeding (soaking pad/hour 2+ hours).
- Foul-smelling discharge + abdominal pain.
- Severe headache / visual changes.
- Chest pain / breathlessness.
- Leg swelling / pain.
- Spreading wound redness.
- Psychosis / severe mood symptoms.
- Severe abdominal pain.
Difference from other scores
- NEWS2: adult, not pregnancy-adjusted.
- MEOWS: modified for pregnant women.
- omqSOFA: obstetric sepsis-specific (SOMANZ 2017).
- NICE NG51: sepsis screen incorporates MEOWS elements.
Different scenarios
Scenario 1: Postpartum day 1, HR 105, otherwise normal
Yellow zone for HR (modern pregnancy / immediate postpartum). Midwife notes, recheck in 1h.
Scenario 2: Day 3 postpartum, fever 38.8, tachycardia 115
Multiple yellow/red. Sepsis screen triggered. Antibiotics within 1h per protocol.
Scenario 3: 28 wk pregnant, BP 165/115 on home reading + headache
Hospital. PE workup. MEOWS in admission. IV labetalol if confirmed.
Scenario 4: Postpartum day 5 at home, sudden chest pain + breathless
999. PE suspected. ECG + D-dimer + CTPA.
Scenario 5: Routine postnatal observations normal, discharged day 1
Standard discharge advice: red flags to return. Community midwife follow-up.
Care guidance — MEOWS
- Routine + protective.
- Pregnancy-adjusted thresholds essential.
- Speak up if you sense something wrong.
- Partner advocacy important.
- Postnatal first 6 weeks vigilance.
- Know red flags to return.
- Sepsis emphasised — subtle in pregnancy.
Sources
- NICE NG51. Sepsis: recognition, diagnosis and early management.
- RCOG Green-top Guideline 64. Bacterial sepsis in pregnancy.
- SOMANZ. Sepsis in pregnancy and the puerperium (omqSOFA 2017).
- MBRRACE-UK. Saving Lives, Improving Mothers’ Care.
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Frequently asked questions
What is MEOWS?
MODIFIED EARLY OBSTETRIC WARNING SCORE — observation chart used during pregnancy + postpartum to DETECT EARLY signs of deterioration. ADAPTED from adult early warning scores (NEWS2) but MODIFIED for pregnancy: PREGNANCY changes BP, HR, RR — thresholds adjusted. 6 PARAMETERS scored: respiratory rate, oxygen saturation, temperature, systolic BP, heart rate, level of consciousness. TRIGGERS escalation: ANY YELLOW (intermediate) → midwife review + recheck soon; ANY RED (severe) OR 2+ YELLOWS → URGENT senior review.
Why is it different from adult NEWS?
PREGNANCY PHYSIOLOGY: (1) HEART RATE rises ~10-15 bpm; (2) BP drops 10-15 mmHg in mid-trimester; (3) RESPIRATORY RATE rises slightly; (4) OXYGEN saturation slightly lower target. STANDARD NEWS uses adult-normal thresholds → would miss early deterioration in pregnant women OR over-trigger false alarms. SOMANZ omqSOFA + MEOWS specifically adjusted thresholds: e.g. SBP ≤90 mmHg (vs <100); RR ≥25 (vs ≥22). CATCHES sepsis, pre-eclampsia, haemorrhage earlier.
When is MEOWS used?
ROUTINELY: (1) ANTENATAL admissions; (2) DURING LABOUR for any concerning observation; (3) POSTNATALLY for ~24-48 hours minimum (longer if complications); (4) ANY MATERNAL illness in pregnancy / postpartum 6 weeks. CONTINUES until stable + return to baseline. CHARTED hourly initially when concerning; less frequent when stable. PART of routine maternity care across UK NHS trusts.
What scores trigger action?
(1) ANY YELLOW SCORE (e.g. HR 100-119 vs normal pregnancy <120, mild deviation): MIDWIFE REVIEW + recheck in 1 hour. (2) ANY RED SCORE (HR ≥120, BP ≤80/40, SpO2 ≤94%, RR ≤8 or ≥30, temp <35 or ≥38.5, low consciousness): IMMEDIATE senior review + obstetric / medical team. (3) TWO OR MORE YELLOW SCORES: URGENT senior review. (4) SEPSIS SUSPICION: 'sepsis screen' triggered with full bundle. ESCALATION PROTOCOLS in each trust.
What conditions does MEOWS catch?
(1) MATERNAL SEPSIS — biggest reason for MEOWS; subtle early signs; saves lives; (2) PRE-ECLAMPSIA — rising BP detected; (3) HAEMORRHAGE — falling BP + rising HR; (4) PULMONARY EMBOLISM — fast HR + RR + low SpO2; (5) AMNIOTIC FLUID EMBOLISM (rare); (6) CARDIAC events — pregnancy can unmask underlying conditions; (7) INFECTIONS general; (8) ECLAMPSIA preceding signs; (9) UNDIAGNOSED DKA in diabetic women. EARLY DETECTION = better outcomes.
Are my observations checked often during labour?
EVERY 30 MIN-1 HOUR typically. INCREASED if any abnormal observation. STANDARD recordings: pulse, BP, temperature, respiratory rate, oxygen saturation. ADDITIONAL: pain, fetal heart, urine output, lochia. MEOWS CHART captures these. FEELS frequent — but routine + helps catch problems early. PARTNER can ask staff to explain.
What if my MEOWS score rises?
MIDWIFE NOTIFIES the team according to protocol. ESCALATION: (1) Increased frequency observations; (2) Doctor review; (3) BLOOD TESTS (FBC, U&E, CRP, lactate, cultures); (4) IV ACCESS; (5) Possible MEDICATIONS (antibiotics if sepsis suspected); (6) FLUID resuscitation if needed; (7) TRANSFER to higher-acuity unit if severe; (8) CONTINUED monitoring. NOT necessarily emergency — context matters. PARENT EXPLANATION provided.
What's the difference between MEOWS, MEWS, NEWS2, omqSOFA?
(1) NEWS2 — National Early Warning Score 2, adult population, not pregnancy-adjusted; (2) MEWS — Modified Early Warning Score, general adult; (3) MEOWS — Modified for pregnant women; (4) omqSOFA — modified obstetric quick Sepsis-related Organ Failure Assessment (SOMANZ 2017) specifically for OBSTETRIC SEPSIS; (5) SIRS / qSOFA — non-pregnancy sepsis criteria; (6) UK NICE NG51 sepsis screen incorporates MEOWS-like elements. EACH has specific use case.
Should partners worry if observations are frequent?
USUALLY NOT cause for alarm — routine + protective. STAFF may be: (1) Performing standard observations; (2) Following up an abnormal reading to confirm; (3) Monitoring a specific concern. ASK STAFF to explain WHY + WHAT they're watching for. KNOWING reduces anxiety. SOMETIMES indicates concern — staff will be transparent about clinical picture. PARTNER advocacy important — speak up if YOU sense something wrong.
What's the postnatal observation schedule?
(1) IMMEDIATE postpartum (1-2 hours): every 15-30 minutes; (2) FIRST 6 HOURS: every hour-2 hours; (3) FIRST 24 HOURS: every 4 hours minimum; (4) ONGOING: depends on condition. POSTPARTUM PE / sepsis / HELLP risk peaks day 3-7 — vigilance maintained. DISCHARGE criteria: stable observations 24+ hours; eating + drinking; passing urine; comfortable mobility; baby feeding; mental health screened.
What's the postpartum 'red flag' to come back?
(1) FEVER (>38°C) — possible sepsis; (2) HEAVY bleeding (soaking pad/hour for 2+ hours); (3) FOUL-smelling discharge + abdominal pain; (4) SEVERE HEADACHE / visual changes — postpartum PE; (5) CHEST PAIN / breathlessness — PE; (6) LEG SWELLING / pain — DVT; (7) SEVERE wound issues (spreading redness, pus); (8) PSYCHOSIS / severe mood symptoms; (9) Severe abdominal pain. CALL maternity unit / 111 / GP same day. /calculators/maternal-sepsis /calculators/postpartum-mood-warning.
Can I check observations at home?
Some women monitor: (1) BP at home (validated cuff) — useful for PE risk; (2) TEMPERATURE if febrile feeling; (3) PULSE awareness. HOME readings can support clinical decisions but DON'T REPLACE professional assessment. CONCERNING reading: call midwife / GP. WHAT TO MONITOR: depends on individual risks. POSTPARTUM PE high-risk women: home BP monitoring valuable; midwife visits include.
Why is sepsis emphasised?
MATERNAL SEPSIS leading cause of maternal death globally (UK MBRRACE reports). PRESENTATION SUBTLE in pregnancy/postpartum — pregnancy physiology masks early signs. RAPID DETERIORATION possible. MEOWS designed to CATCH EARLY before full sepsis develops. SEPSIS SIX bundle within 1 hour saves lives. POSTPARTUM risk peaks days 1-7. EVERY MEOWS escalation considers sepsis. /calculators/maternal-sepsis.
How does this relate to other calculators on BumpBites?
Companion: /calculators/maternal-sepsis; /calculators/preeclampsia-diagnosis; /calculators/hellp-classifier; /calculators/pph-qbl; /calculators/postpartum-mood-warning; /calculators/lochia-tracker; /calculators/hypertensive-emergency-pregnancy.