All EMS presentations
Obstetric/GynecologicClinical presentation

Vaginal bleeding / gynecologic emergency

A streamlined, differential-led presentation for rapid clinical review.

Clinical snapshot

Twenty-second review

  • Vaginal bleeding may arise from pregnancy complications, uterine or cervical disease, trauma, or hormonal causes and can produce significant concealed or visible blood loss.
  • Pregnancy, heavy ongoing bleeding, syncope, shock, severe pain, postpartum state, or anticoagulation requires urgent assessment.
  • Keep gi or urinary bleeding in the differential; overlapping or concurrent illness remains possible.
  • For vaginal bleeding / gynecologic emergency, trends and combinations of findings are more informative than one isolated vital sign.
Differentials

Compare the clinical patterns

The repeated material is grouped inside each possibility. Open only the condition you need.

Serious3 conditions
Ectopic pregnancyTime-sensitive high-risk possibility

HPI

Clarify pregnancy possible/confirmed; gestational age; amount/pads/clots.

Signs & symptoms

Pregnancy, severe pain, syncope, or shock.

Focused exam

Assess abdominal tenderness, fundal height or contractions when appropriate, visible bleeding, perineal findings only when necessary, and maternal perfusion; Preserve privacy and use a chaperone or support person when possible.

Brief pathophysiology

Ectopic pregnancy may cause vaginal bleeding / gynecologic emergency through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Hemorrhage is a trend diagnosis: tachycardia and narrowing pulse pressure may precede hypotension. Age, pregnancy, medications, and pacing can blunt expected responses.

Heart rate (bpm)

Often rises

Tachycardia is a common compensatory response but may be absent.

Pulse pressure (mmHg)

May narrow

Narrowing pulse pressure can reflect reduced stroke volume.

Blood pressure (mmHg)

May fall late

A normal pressure does not exclude significant compensated hemorrhage.

MAP (mmHg)

May fall

A falling trend supports worsening perfusion; interpret with mental status and skin signs.

Front-load in the triage report

  • Ectopic pregnancy: Pregnancy, severe pain, syncope, or shock.
  • Pregnancy possible/confirmed?
  • Gestational age.
Obstetric hemorrhageTime-sensitive high-risk possibility

HPI

Clarify gestational age; amount/pads/clots; abdominal/pelvic pain.

Signs & symptoms

Pregnancy, severe pain, syncope, or shock.

Focused exam

Preserve privacy and use a chaperone or support person when possible; Quantify bleeding by history and materials, assess abdominal tenderness, pregnancy status, pallor, perfusion, and trauma while preserving privacy.

Brief pathophysiology

Obstetric hemorrhage may cause vaginal bleeding / gynecologic emergency through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Hemorrhage is a trend diagnosis: tachycardia and narrowing pulse pressure may precede hypotension. Age, pregnancy, medications, and pacing can blunt expected responses.

Heart rate (bpm)

Often rises

Tachycardia is a common compensatory response but may be absent.

Pulse pressure (mmHg)

May narrow

Narrowing pulse pressure can reflect reduced stroke volume.

Blood pressure (mmHg)

May fall late

A normal pressure does not exclude significant compensated hemorrhage.

MAP (mmHg)

May fall

A falling trend supports worsening perfusion; interpret with mental status and skin signs.

Front-load in the triage report

  • Obstetric hemorrhage: Pregnancy, severe pain, syncope, or shock.
  • Gestational age.
  • Amount/pads/clots.
Major gynecologic bleedingTime-sensitive high-risk possibility

HPI

Clarify amount/pads/clots; abdominal/pelvic pain; syncope/dizziness.

Signs & symptoms

Pregnancy, severe pain, syncope, or shock.

Focused exam

Preserve privacy and use a chaperone or support person when possible; Quantify bleeding by history and materials, assess abdominal tenderness, pregnancy status, pallor, perfusion, and trauma while preserving privacy.

Brief pathophysiology

Major gynecologic bleeding may cause vaginal bleeding / gynecologic emergency through a time-sensitive process capable of rapid physiological deterioration.

Vital-sign pattern

What the trend may show

Possible pattern

Pregnancy changes baseline physiology and can mask blood loss. Trend heart rate, pressure, breathing, and oxygenation in gestational and postpartum context.

Heart rate (bpm)

Use pregnancy baseline

A modestly higher baseline is common; disproportionate tachycardia can signal bleeding or illness.

Blood pressure (mmHg)

Trend carefully

Hypotension may be late in hemorrhage; hypertension may indicate a pregnancy-specific emergency.

Respiratory rate (breaths/min)

Trend rate / effort

Tachypnea may reflect pain, shock, PE, or systemic illness.

Oxygen saturation (SpO₂)

Usually preserved

Low saturation requires assessment for PE, pulmonary edema, or respiratory disease.

Front-load in the triage report

  • Major gynecologic bleeding: Pregnancy, severe pain, syncope, or shock.
  • Amount/pads/clots.
  • Abdominal/pelvic pain.
Common2 conditions
Dysfunctional uterineCommon presentation pattern

HPI

Clarify pregnancy possible/confirmed; gestational age; amount/pads/clots.

Signs & symptoms

Pattern, menstrual history, and absence of systemic compromise may support a less acute cause.

Focused exam

Assess abdominal tenderness, fundal height or contractions when appropriate, visible bleeding, perineal findings only when necessary, and maternal perfusion; Preserve privacy and use a chaperone or support person when possible.

Brief pathophysiology

Dysfunctional uterine may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.

Vital-sign pattern

What the trend may show

Possible pattern

Pregnancy changes baseline physiology and can mask blood loss. Trend heart rate, pressure, breathing, and oxygenation in gestational and postpartum context.

Heart rate (bpm)

Use pregnancy baseline

A modestly higher baseline is common; disproportionate tachycardia can signal bleeding or illness.

Blood pressure (mmHg)

Trend carefully

Hypotension may be late in hemorrhage; hypertension may indicate a pregnancy-specific emergency.

Respiratory rate (breaths/min)

Trend rate / effort

Tachypnea may reflect pain, shock, PE, or systemic illness.

Oxygen saturation (SpO₂)

Usually preserved

Low saturation requires assessment for PE, pulmonary edema, or respiratory disease.

Front-load in the triage report

  • Pattern, menstrual history, and absence of systemic compromise may support a less acute cause.
  • Pregnancy possible/confirmed?
  • Gestational age.
Local bleedingCommon presentation pattern

HPI

Clarify gestational age; amount/pads/clots; abdominal/pelvic pain.

Signs & symptoms

Pattern, menstrual history, and absence of systemic compromise may support a less acute cause.

Focused exam

Preserve privacy and use a chaperone or support person when possible; Quantify bleeding by history and materials, assess abdominal tenderness, pregnancy status, pallor, perfusion, and trauma while preserving privacy.

Brief pathophysiology

Local bleeding may explain the presenting symptoms through a common clinical mechanism, while serial assessment checks for complications or an alternate cause.

Vital-sign pattern

What the trend may show

Possible pattern

Pregnancy changes baseline physiology and can mask blood loss. Trend heart rate, pressure, breathing, and oxygenation in gestational and postpartum context.

Heart rate (bpm)

Use pregnancy baseline

A modestly higher baseline is common; disproportionate tachycardia can signal bleeding or illness.

Blood pressure (mmHg)

Trend carefully

Hypotension may be late in hemorrhage; hypertension may indicate a pregnancy-specific emergency.

Respiratory rate (breaths/min)

Trend rate / effort

Tachypnea may reflect pain, shock, PE, or systemic illness.

Oxygen saturation (SpO₂)

Usually preserved

Low saturation requires assessment for PE, pulmonary edema, or respiratory disease.

Front-load in the triage report

  • Pattern, menstrual history, and absence of systemic compromise may support a less acute cause.
  • Gestational age.
  • Amount/pads/clots.
Mimics2 conditions
GIImportant alternative presentation

HPI

Clarify pregnancy possible/confirmed; gestational age; amount/pads/clots.

Signs & symptoms

Source can be misidentified without careful history and external assessment.

Focused exam

Assess abdominal tenderness, fundal height or contractions when appropriate, visible bleeding, perineal findings only when necessary, and maternal perfusion; Preserve privacy and use a chaperone or support person when possible.

Brief pathophysiology

GI can resemble vaginal bleeding / gynecologic emergency through overlapping symptoms or referred physiology despite a different primary mechanism.

Vital-sign pattern

What the trend may show

Possible pattern

Pregnancy changes baseline physiology and can mask blood loss. Trend heart rate, pressure, breathing, and oxygenation in gestational and postpartum context.

Heart rate (bpm)

Use pregnancy baseline

A modestly higher baseline is common; disproportionate tachycardia can signal bleeding or illness.

Blood pressure (mmHg)

Trend carefully

Hypotension may be late in hemorrhage; hypertension may indicate a pregnancy-specific emergency.

Respiratory rate (breaths/min)

Trend rate / effort

Tachypnea may reflect pain, shock, PE, or systemic illness.

Oxygen saturation (SpO₂)

Usually preserved

Low saturation requires assessment for PE, pulmonary edema, or respiratory disease.

Front-load in the triage report

  • Source can be misidentified without careful history and external assessment.
  • Pregnancy possible/confirmed?
  • Gestational age.
Urinary bleedingImportant alternative presentation

HPI

Clarify gestational age; amount/pads/clots; abdominal/pelvic pain.

Signs & symptoms

Source can be misidentified without careful history and external assessment.

Focused exam

Preserve privacy and use a chaperone or support person when possible; Quantify bleeding by history and materials, assess abdominal tenderness, pregnancy status, pallor, perfusion, and trauma while preserving privacy.

Brief pathophysiology

Urinary bleeding can resemble vaginal bleeding / gynecologic emergency through overlapping symptoms or referred physiology despite a different primary mechanism.

Vital-sign pattern

What the trend may show

Possible pattern

Pregnancy changes baseline physiology and can mask blood loss. Trend heart rate, pressure, breathing, and oxygenation in gestational and postpartum context.

Heart rate (bpm)

Use pregnancy baseline

A modestly higher baseline is common; disproportionate tachycardia can signal bleeding or illness.

Blood pressure (mmHg)

Trend carefully

Hypotension may be late in hemorrhage; hypertension may indicate a pregnancy-specific emergency.

Respiratory rate (breaths/min)

Trend rate / effort

Tachypnea may reflect pain, shock, PE, or systemic illness.

Oxygen saturation (SpO₂)

Usually preserved

Low saturation requires assessment for PE, pulmonary edema, or respiratory disease.

Front-load in the triage report

  • Source can be misidentified without careful history and external assessment.
  • Gestational age.
  • Amount/pads/clots.
Red flags

Findings that should escalate concern

  • Pregnancy, heavy ongoing bleeding, syncope, shock, severe pain, postpartum state, or anticoagulation requires urgent assessment.
  • Ectopic pregnancy, obstetric hemorrhage, or major gynecologic bleeding: Pregnancy, severe pain, syncope, or shock.
Related medications

Medication recognition

ApixabanRivaroxabanClopidogrelWarfarin
Related EMS presentations

Continue the clinical pathway

GIGI bleedObstetric/GynecologicPregnancy / labourHematologicBleeding while anticoagulatedObstetric/GynecologicPostpartum complicationObstetric/GynecologicEarly-pregnancy pain / bleeding
References

Clinical and academic sources

Curated clinical guidance and peer-reviewed evidence supporting this presentation. Current BCEHS guidance, medical direction, and local policy remain authoritative for practice.

BCEHS Handbook — specific CPGs

  1. L05: Maternal Vaginal Bleeding (< 20 Weeks)BC Emergency Health Services Handbook

    Official BCEHS clinical practice guidance for maternal vaginal bleeding (< 20 weeks).

  2. L06: Maternal Vaginal Bleeding (> 20 Weeks)BC Emergency Health Services Handbook

    Official BCEHS clinical practice guidance for maternal vaginal bleeding (> 20 weeks).

Supporting clinical and academic evidence

  1. Practice Bulletin No. 193: Tubal Ectopic PregnancyAmerican College of Obstetricians and Gynecologists

    Evidence-based diagnosis and management guidance for tubal ectopic pregnancy.

  2. CEDIS Presenting Complaint List updateCanadian Association of Emergency Physicians

    Presenting-complaint terminology and categorization context. It does not establish a prehospital “top 100” ranking.

  3. Consolidated guidelines for the prevention, diagnosis and treatment of postpartum haemorrhageWorld Health Organization

    Current evidence-based guidance for recognition and management of postpartum hemorrhage in healthcare settings.

  4. ACOG Practice Bulletin No. 193: Tubal Ectopic PregnancyObstetrics & Gynecology · 2018

    Pregnancy testing context, ectopic pregnancy risk, hemorrhage recognition, and urgent assessment of early-pregnancy bleeding.