• Cumulative blood loss of greater than or equal to 1000 ML within 24 hours of delivery through four weeks postpartum that requires intervention.
  NICHD Pediatric Terminology
  U.S. National Cancer Institute, 2021
• Excess blood loss from uterine bleeding associated with OBSTETRIC LABOR or CHILDBIRTH. It is defined as blood loss greater than 500 ml or of the amount that adversely affects the maternal physiology, such as BLOOD PRESSURE and HEMATOCRIT. Postpartum hemorrhage is divided into two categories, immediate (within first 24 hours after birth) or delayed (after 24 hours postpartum).
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2021
• Hemorrhage defined as a blood loss in excess of 500 mL after vaginal delivery or more than 1000 mL after a cesarean delivery.
  NCI Thesaurus
  U.S. National Cancer Institute, 2021
• (post-partum hemorrhage) Significant maternal haemorrhage/blood loss following deilvery of a child.
  Human Phenotype Ontology (HPO)
  The Human Phenotype Ontology Project, 2021
• Postpartum hemorrhage is blood loss of > 1000 mL or blood loss accompanied by symptoms or signs of hypovolemia within 24 hours of birth. Diagnosis is clinical. Treatment depends on etiology of the hemorrhage.
  Merck Manuals
  Merck & Co., Inc., 2020
• Postpartum hemorrhage (PPH) is the leading cause of maternal mortality. All women who carry a pregnancy beyond 20 weeks� gestation are at risk for PPH and its sequelae.
  Medscape
  WebMD, 2019