Orris

WHO definition of postnatal depression

Reading File
Searching the Web

WHO definition postnatal depression ICD-11 2024

Finding Sources
Reading Web Page

WHO ICD-11 postnatal depression definition diagnostic criteria

Reading File
Reading File
I now have solid material to give a thorough, well-sourced answer.

WHO Definition of Postnatal Depression

ICD-11 Classification (WHO, v2026-01)

Under ICD-11, postnatal depression is coded as 6E20 - Mental or behavioural disorders associated with pregnancy, childbirth or the puerperium, without psychotic symptoms.
The WHO ICD-11 definition is:
"A syndrome associated with pregnancy or the puerperium (commencing within about 6 weeks after delivery) that involves significant mental and behavioural features, most commonly depressive symptoms. The syndrome does not include delusions, hallucinations, or other psychotic symptoms. If the symptoms meet the diagnostic requirements for a specific mental disorder, that diagnosis should also be assigned."
Important exclusion: The designation should NOT be used for mild and transient depressive symptoms that do not meet diagnostic requirements for a depressive episode - these are called "postpartum blues."

ICD-11 Synonyms (all map to 6E20)

  • Postnatal depression NOS
  • Postpartum depression NOS
  • Puerperal depression NOS
  • Baby blues / maternity blues / third day blues

Clinical Features (per diagnostic requirements)

When postnatal depression meets the threshold for a depressive episode, the WHO ICD-11 CDDR criteria (mirroring ICD-11's general depressive disorder criteria) require:
FeatureDetail
Core mood symptomsDepressed mood, anhedonia, reduced energy or fatigue
Cognitive symptomsDifficulty concentrating, feelings of worthlessness or guilt, hopelessness
Neurovegetative symptomsSleep disturbance, appetite change, psychomotor agitation or retardation
RiskRecurrent thoughts of death or suicidal ideation
DurationSymptoms present for most of the day, nearly every day, for at least 2 weeks
ImpairmentSignificant distress or functional impairment in personal, family, social, or occupational domains
No psychotic features (no delusions or hallucinations) - if those are present, a different code applies (6E21).

Key Distinguishing Points (WHO framework)

  1. Onset window: Commences within ~6 weeks of delivery for the puerperium specifier. However, clinically and in practice (including Edinburgh Postnatal Depression Scale use), the period extends to 12 months postpartum.
  2. Postpartum blues vs. PND: Blues are transient (typically 3-5 days postpartum), mild, self-limiting, and do NOT qualify as postnatal depression under ICD-11.
  3. Puerperal psychosis is a separate, more severe entity (6E21) involving psychotic features.
  4. Spectrum: PND sits between postpartum blues (mild, transient) and puerperal psychosis (severe, with psychosis).

Epidemiology (WHO-recognized figures)

  • Affects approximately 10-15% of women globally after delivery
  • More common in low- and middle-income countries (up to 20%)
  • One of the leading causes of maternal morbidity in the perinatal period
  • Fathers/partners can also be affected (paternal PND is recognized)

Screening Tool

The Edinburgh Postnatal Depression Scale (EPDS) - a 10-item validated questionnaire translated into 24+ languages - is the standard WHO-endorsed screening tool. A score of ≥13 is typically used as a threshold for probable PND, though cut-offs vary by setting.

Clinical Significance

Unrecognized PND carries risks of:
  • Maternal suicide
  • Infanticide
  • Impaired mother-infant bonding
  • Long-term cognitive, neurological, and motor developmental delays in the child
(Sources: ICD-11 MMS v2026-01 code 6E20; Berek & Novak's Gynecology, p. 1104-1105; Rosen's Emergency Medicine, p. 3423)
This is a shared conversation. Sign in to Orris to start your own chat.