Reproductive · PANCE / PANRE

Postpartum Depression and Postpartum Psychosis

Spectrum from common postpartum blues to severe depression and rare psychosis.

Also known as: postpartum depression, PPD, postpartum psychosis, perinatal depression, baby blues

Overview

Postpartum blues: transient, mild mood symptoms in the first 2 weeks postpartum, self-limited. Postpartum (perinatal) depression: a major depressive episode with onset during pregnancy or within 12 months postpartum, lasting >=2 weeks. Postpartum psychosis: a psychiatric emergency with delusions, hallucinations, disorganized behavior, or severe mood disturbance, usually within 4 weeks of delivery.

Epidemiology

Postpartum blues: up to 80% of postpartum women. PPD: 10-15% of postpartum women. Postpartum psychosis: 1-2 per 1000 deliveries; markedly increased risk in women with bipolar disorder (up to 25-50%).

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Risk factors

Personal or family history of depression, bipolar disorder, or postpartum psychiatric illness
Discontinuation of psychotropic medication in pregnancy
Poor social support, intimate partner violence, recent stressful life events
Adolescent pregnancy, unintended pregnancy, pregnancy loss or NICU admission
Sleep deprivation, thyroid dysfunction (postpartum thyroiditis)

Pathophysiology

Multifactorial — abrupt drop in estrogen and progesterone after delivery, HPA-axis dysregulation, inflammatory cytokines, sleep deprivation, and genetic vulnerability. Postpartum psychosis is now considered closely related to bipolar disorder.

Clinical presentation

Symptoms

Depression: depressed mood, anhedonia, sleep/appetite changes, guilt, fatigue, poor concentration, suicidal ideation; may include obsessive thoughts of harming the baby (ego-dystonic, usually no intent to act)
Psychosis: rapid onset (often first 2 wk) of insomnia, irritability, mood swings, paranoia, hallucinations, delusions (often involving the infant), confusion, disorganization
Difficulty bonding with the infant; thoughts of self-harm or harming the infant

Signs / physical exam

Flat affect, poor eye contact, tearfulness, psychomotor changes
Disorganized speech or behavior in psychosis

Differential diagnosis

Postpartum blues — Mild tearfulness, mood lability beginning day 2-5 and resolving by 2 wk; no impairment, no suicidal ideation
Postpartum thyroiditis — Transient hyperthyroidism (1-4 mo) followed by hypothyroidism (4-8 mo); can mimic mood symptoms — check TSH
Sheehan syndrome — Postpartum hemorrhage history; failure to lactate, hypotension, fatigue; low ACTH/TSH/gonadotropins
Substance use — Symptoms tied to use; toxicology
Primary psychotic disorder — Pre-existing schizophrenia; onset not specifically perinatal

Diagnostic workup

Diagnostic criteria

DSM-5-TR: major depressive episode with peripartum-onset specifier (onset during pregnancy or within 4 weeks postpartum; in practice screening covers up to 12 mo). Edinburgh Postnatal Depression Scale (EPDS, cutoff >=10) or PHQ-9 used for screening. Postpartum psychosis: criteria for brief psychotic disorder or bipolar/mood disorder with psychotic features and peripartum onset.

Labs

TSH and free T4 (postpartum thyroiditis)
CBC (anemia), CMP, vitamin D, vitamin B12
Toxicology if clinically indicated

Imaging

Neuroimaging if focal findings, severe headache, or first psychotic episode without explanation

Diagnostic algorithm

Condition	Onset	Duration	Key Features	Treatment
Postpartum blues	Day 2-5	<=2 weeks	Mild lability, tearfulness; no impairment	Reassurance, support, observation
Postpartum depression	Within 12 mo (often <3 mo)	>=2 weeks	Depressed mood, anhedonia, +/- intrusive thoughts	Psychotherapy +/- SSRI (sertraline); brexanolone/zuranolone in severe
Postpartum psychosis	Often first 2 wk	Variable	Hallucinations, delusions, disorganization, infanticidal/suicidal thoughts	Psychiatric emergency, admit, mood stabilizer + antipsychotic, ECT for refractory

Spectrum of postpartum mood disorders.

Treatment

First-line

Universal screening for perinatal depression at the initial OB visit, at least once during pregnancy, at the postpartum visit, and at well-child visits (USPSTF, ACOG, AAP)
Mild-moderate PPD: psychotherapy (CBT, interpersonal therapy) +/- SSRI
Moderate-severe PPD or with suicidal ideation: SSRI (sertraline preferred — low breast milk transfer; paroxetine alternative) + psychotherapy + safety planning
Brexanolone IV (60 h infusion) or oral zuranolone (14-day course) — FDA-approved neuroactive steroid GABA-A modulators for postpartum depression with rapid onset
Postpartum psychosis is a psychiatric emergency: immediate hospitalization, do not leave mother alone with infant, evaluate for harm to self or infant; mood stabilizer (lithium, valproate — avoid valproate if breastfeeding/women of reproductive age), atypical antipsychotic (olanzapine, risperidone), ECT considered for refractory or severe cases

Breastfeeding considerations

Sertraline and paroxetine have the lowest infant exposure
Fluoxetine has a long half-life and active metabolites — relatively higher infant levels
Lithium and valproate generally avoided during breastfeeding (lithium is acceptable with monitoring per recent guidelines)
Most antipsychotics (olanzapine, quetiapine, risperidone) compatible with breastfeeding

Second-line / adjunct

SNRI (venlafaxine, duloxetine), bupropion, mirtazapine for partial response or specific symptom profile
ECT for severe, refractory, or psychotic depression
Social support, partner involvement, sleep optimization

Complications

Maternal suicide (leading cause of postpartum maternal mortality in many high-income countries)
Infanticide (rare, predominantly in postpartum psychosis)
Impaired maternal-infant bonding, child developmental delays, behavioral problems
Family disruption, marital discord, recurrent depression

PANCE pearls

Postpartum blues do not require treatment but warrant follow-up — persistence beyond 2 weeks or impairment should prompt reassessment for PPD.
Postpartum psychosis is a psychiatric emergency. Up to 4% commit infanticide and 5% suicide if untreated — admit and never leave mother alone with infant until stabilized.
Sertraline is the preferred SSRI in lactating mothers given its minimal breast milk transfer.
Always check TSH in postpartum mood disorders — postpartum thyroiditis is common and treatable.
Bipolar disorder must be considered before starting an SSRI alone — unrecognized bipolar postpartum psychosis can be precipitated or worsened by monotherapy antidepressants.

References

ACOG CO 757 — ACOG Committee Opinion 757: Screening for Perinatal Depression (Obstet Gynecol 2018)
USPSTF 2019 — USPSTF: Interventions to Prevent Perinatal Depression (Grade B)
FDA Brexanolone — FDA approval Zulresso (brexanolone) for postpartum depression (2019); Zurzuvae (zuranolone) (2023)

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