DSM-I came out in 1951, and no update since has recognized this disorder
A devastating disorder that readily responds to treatment, yet the DSM has no name for it
STUDY: Bergink V et al, Biological Psychiatry 2026
STUDY TYPE: Review and expert consensus statement
FUNDING: National Institutes of Health; European Research Council; UK Medical Research Council
Summary
A consensus statement in Biological Psychiatry argues for recognition of postpartum psychosis as a unique disorder in the DSM. Right now, it is only a specifier. Most cases have strong bipolar features, so they suggest placing this new criteria in the bipolar chapter.
Proposed Diagnostic Criteria
The onset of at least one of the following states (at least 1 of 6) within 12 weeks of childbirth, lasting at least 1 week and present most of the day, nearly every day, or for any duration if hospitalization is necessary:
- Mania/mixed state
- Delusions
- Hallucinations
- Disorganized speech or formal thought disorder
- Disorganized, confusional, or catatonic behavior; or
- Depression with psychotic features.
Why it Matters
Without this recognition, clinicians are likely to miss these cases in favor of milder disorders like peripartum depression. That leads to overuse of antidepressants, which can worsen the manic side of this disorder.
Instead, guidelines recommend a bipolar-informed approach. Lithium and antipsychotics acutely, with lithium for long-term continuation. Electroconvulsive therapy is also effective.
When treated right, remission rates are much higher than what we see with general bipolar. One large cohort study found a 98% remission rate using a stepwise approach of benzodiazepines, antipsychotics, and lithium. Over the following year, lithium monotherapy lowered relapse risks. Recurrence is common after a second pregnancy, and lithium can be started after delivery to prevent postpartum psychosis in those cases.
Diagnostic hierarchy. Postpartum psychosis belongs above peripartum depression, for the same reasons that a bipolar diagnosis trumps major depression. Half of women who have one postpartum psychotic episode go on to develop bipolar disorder; the other half never have another episode outside the postpartum window. Almost none develop schizophrenia, even if their first episode looked like it. The polygenic risk scores closely resemble bipolar disorder.
DSM’s “peripartum onset” specifier implies that this disorder can begin during pregnancy, but it almost never does. Postpartum psychosis usually begins within two weeks of delivery, peaking at 8-10 days. The rate is 1:500 to 1:1,000 births, and the disorder carries a high suicide risk (4-11%).
How to Recognize Postpartum Psychosis
People with psychosis often hide their most severe symptoms, either out of shame, paranoia, or fear that we will hospitalize them or take away their children. Depression is passive, but psychosis and mania show themselves in active behavioral changes. So probe further and speak to family, especially when you see signs of:
- Unusual behavior
- Confusion
- Hospitalization or ED visits
- Signs of irrational thought, including unusual questions; rigid, concrete, or black-and-white thinking; or accusations within the family
- Severe changes in mental status, including a puzzled expression, as if “out of it” or dissociated
- Anger, impulsiveness, severe insomnia, or other manic symptoms
- Worsening or non-response to antidepressants
The illness looks different from ordinary psychosis, too. Most women present with mania, a mixed episode, or depression with psychotic features. Confusion, agitation, and irritability show up alongside the delusions and hallucinations.
Causes
Why does this unique psychosis start after childbirth? The authors point to several overlapping systems: sleep loss, which can trigger mania on its own; swings in reproductive hormones, which postpartum women experience in the most extreme form of their lives; and immune activation, the same kind that flares autoimmune diseases like thyroiditis and rheumatoid arthritis right after delivery.
Brain scans of women at high risk show reduced gray matter in regions tied to emotion and memory, plus altered connectivity in the prefrontal cortex.
Reason to Hope
The prognosis, at least, is good news. Roughly three-quarters of women recover their prior level of functioning within a year. For women with bipolar disorder or a prior episode, the panel recommends specialist care during pregnancy, a written plan for the postpartum period, and for women with past episodes or high risk, preventive lithium right after delivery.
Practice Implications
- When a woman presents with postpartum depression, look for signs of bipolar or psychosis. Family input is a helpful guide.
- Even if they don’t have psychosis, bringing the family in for education and counseling around depression is part of the plan for peripartum depression.
—Chris Aiken, MD
Director, Psych Partners
Editor in Chief, Carlat Psychiatry Report
