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Postpartum hemorrhage

Last updated: June 8, 2026

Quick guidetoggle arrow icon

Diagnostic approach

Red flag features

Management checklist

4 Ts of PPH: Tone (uterine atony), Trauma (laceration, inversion), Tissue (retained placenta), Thrombin (coagulopathy)

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Summarytoggle arrow icon

Postpartum hemorrhage (PPH) is an obstetric emergency characterized by excessive bleeding after delivery. PPH is a leading cause of maternal mortality worldwide. Primary PPH is defined as a cumulative blood loss of ≥ 1000 mL or bleeding with signs of hypovolemia within 24 hours of delivery, while secondary PPH occurs between 24 hours and 12 weeks postpartum. The most common cause of primary PPH is uterine atony. Other common causes include obstetric injuries, retained placenta, and coagulation disorders. Secondary PPH is most commonly caused by, e.g., retained placenta and/or retained placental tissue, infection, subinvolution of the placental site, or coagulation disorders. Clinical manifestations include heavy vaginal bleeding and signs of hypovolemic shock, such as hypotension and tachycardia. Diagnosis is made through early recognition of excessive bleeding and a systematic physical examination to identify the underlying cause, sometimes confirmed with ultrasound. Initial management involves resuscitation (IV fluids, blood products) and administration of tranexamic acid. Cause-specific treatments include bimanual uterine massage and uterotonic agents like oxytocin for uterine atony, suturing lacerations, and removal of retained placental tissue. For refractory bleeding, invasive procedures (e.g., uterine artery embolization, hysterectomy) may be necessary.

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Overviewtoggle arrow icon

Primary postpartum hemorrhage [1][2][3]

Common causes of primary PPH [1][2][3]
‎4 Ts Causes Distinguishing features Key management
Tone
Trauma
Tissue
Thrombin

Secondary postpartum hemorrhage [1][5]

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Epidemiologytoggle arrow icon

  • Leading cause of maternal mortality worldwide [1][2]
  • PPH complicates 1–10% of deliveries worldwide. [2]
  • PPH causes 11% of maternal deaths in the US. [5]

Epidemiological data refers to the US, unless otherwise specified.

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Clinical featurestoggle arrow icon

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Diagnosistoggle arrow icon

Approach

Do not delay urgent initial management of PPH to obtain diagnostic studies.

Clinical evaluation [1][2]

Laboratory studies [5][7]

Imaging [8]

Consider imaging for bleeding unresponsive to initial management of PPH. [8]

Additional investigations

Further investigation is based on the underlying cause, e.g.:

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Managementtoggle arrow icon

Initial management of PPH [1][2][3]

Pursue the following interventions for PPH in parallel.

Suspect hemodynamic instability in patients with shock index > 0.9. [2]

While managing postpartum hemorrhage, ensure parallel neonatal care. Maternal resuscitation must not delay essential immediate care of the newborn.

Management of refractory PPH [1][2][3]

Urgently consult a specialist (e.g., OB/GYN, interventional radiology) for invasive source control of bleeding refractory to conservative measures, as delays increase maternal morbidity and mortality. [2][3]

Ongoing management

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Subtypes and variantstoggle arrow icon

The following subtypes are not comprehensive.

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Uterine atonytoggle arrow icon

Definition

Uterine atony is a failure of the uterus to effectively contract after delivery of the placenta. [13]

Epidemiology

Uterine atony is the most common cause of primary PPH (70–80% of cases). [1]

Pathophysiology [13]

  • Normally, the myometrium contracts and compresses the spiral arteries, which stops bleeding after delivery.
  • Failure of the myometrium to effectively contract can lead to rapid and severe hemorrhage.

Risk factors [13][14]

AEIOU are risk factors for uterine atony: Anatomic abnormalities, Exhausted myometrium, Infections, Overdistended Uterus

Clinical features [1]

Diagnosis [1][16]

Uterine atony is a clinical diagnosis.

Treatment [1][7][13][16]

See "Management of PPH" for the comprehensive approach to all patients with PPH.

Administer tranexamic acid concomitantly with uterotonic agents. [1][2][3]

Prevention

See "Active management of the third stage of labor."

Complications

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Uterine inversiontoggle arrow icon

Definition

Epidemiology

  • Uncommon complication of vaginal birth
  • Morbidity and mortality occurs in ∼ 41% of cases. [18]

Classification [19]

Degree of inversion

Time of onset

  • Acute uterine inversion: uterine inversion occurring immediately after or within 24 hours of delivery
  • Chronic uterine inversion: uterine inversion that has gone unnoticed or uncorrected, usually seen weeks or months after delivery

Etiology

Risk factors [1][7]

Pathophysiology

  • Partial uterine wall relaxation → prolapse of the uterine wall through the cervical orifice, and if simultaneous downward traction of the uterus is performed → inversion of the uterus

Clinical features

Diagnosis

Treatment [1]

General measures

Manual uterine repositioning

  • Technique [1][7]
    • Grasp the protruding uterus at the fundus with the thumb on the anterior surface and the four other fingers on the posterior surface.
    • Carefully push the uterus back toward the posterior fornix through the pelvic cavity until it is in the correct position.
  • If repositioning is unsuccessful
  • Following successful repositioning: oxytocin to induce placental extraction and prevent atony and reinversion

Complications

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Retained placentatoggle arrow icon

Definitions [20]

Retained placenta usually manifests as primary PPH with a prolonged third stage of labor; retained placental tissue can manifest as primary PPH or secondary PPH (i.e., delayed onset) based on the size of the fragments.

Epidemiology [20]

Retained placenta and/or retained placental fragments occur in 0.1–3% of vaginal deliveries.

Etiology [20]

Risk factors [20][22]

Clinical features [20]

A firmly palpable and contracted uterus makes uterine atony a less likely underlying cause. Consider an alternate etiology, e.g., premature cervical closure, or placenta accreta spectrum.

Diagnosis [1]

Retained placental tissue is unlikely if the endometrial stripe appears completely normal on ultrasound (e.g., normal thickness, no masses, and no abnormal color Doppler flow.) [1]

Management [20]

Approach

Manual removal of placenta

Consider a clinical diagnosis of placenta accreta spectrum if manual placental removal is impossible, especially if the cleavage plane between the placenta and the myometrium is impalpable. [26]

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Bleeding obstetrical injuriestoggle arrow icon

The following section discusses bleeding genital tract injuries occurring as a complication of birth. For other etiologies (e.g., accidental or intentional trauma), see "Vulvar and vaginal injuries" and "Trauma in pregnant individuals." For nonbleeding injuries, see "Complications of normal labor and delivery." For fetal injuries, see "Birth traumas."

Overview of injuries

Epidemiology

  • Second most common cause of PPH (20% of cases) [27]
  • Estimated incidence of puerperal hematoma ranges from 1:300 to 1:1500 deliveries.

Etiology [7][28][29]

Clinical features

Search for obstetric injury in a postpartum patient with a sudden change in vital signs suggesting hypovolemic shock, even if there is no visible external bleeding. Occult bleeding into the peritoneal and retroperitoneal spaces is possible.

Treatment [1][7][29]

See also "Perineal lacerations" and "Uterine rupture."

Prevention [29]

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Subinvolution of placental implantation sitetoggle arrow icon

Definition

  • A condition in which the uterus remains abnormally large following delivery because of the persistence of dilated uteroplacental vessels

Epidemiology

Risk factors [23]

Clinical features

Diagnostics [33]

Treatment [34][35]

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Coagulation disorderstoggle arrow icon

Etiology

Clinical features

Diagnosis

Treatment

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Preventiontoggle arrow icon

Risk assessment and preparation for delivery [1][2][5]

Active management of the third stage of labor [1][2][7][21]

Active management refers to the following PPH prevention measures and is recommended for all patients in the third stage of labor. [21]

Avoid routine episiotomy and assisted vaginal delivery during active management of the third stage of labor.

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Complicationstoggle arrow icon

We list the most important complications. The selection is not exhaustive.

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