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 |
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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