Postpartum Psychosis Is Treatable 98% of the Time, If Caught

Postpartum psychosis eases in about 98% of patients once lithium and other medications are started, according to WBUR, which makes it one of the most treatable emergencies in all of psychiatry. It is also, according to the doctors who spend their careers on it, one of the most reliably missed illnesses in American medicine. Both things are true at once, and the gap between them is where families fall.

That gap is currently on public display in a Massachusetts courtroom. Lindsay Clancy, 36, a former labor and delivery nurse at Massachusetts General Hospital, is on trial in the deaths of her three children — Cora, 5; Dawson, 3; and 8-month-old Callan — at the family's Duxbury home on January 24, 2023. She has pleaded not guilty to three counts of murder. Opening statements began on July 27, 2026, and testimony was still running in mid-August.

Nobody in that courtroom disputes what happened, or that she was ill. The fight is over whether she could tell right from wrong. Her lawyers say the illness erased that line; prosecutors say the killings were deliberate and meticulous. A conviction means life in prison. A finding that she is not criminally responsible starts the process of committing her to a psychiatric hospital instead.

What Postpartum Psychosis Actually Looks Like

This is not an intense version of the baby blues, and it is not postpartum depression. Symptoms usually surface within days of delivery, though onset can stretch out to six weeks: hallucinations, delusions, paranoia, disorganized thinking, sharp mood swings, and an insomnia that goes well past normal newborn exhaustion. The Cleveland Clinic describes it as a mental health emergency that scrambles a person's grip on reality.

Meghan Cliffel, who developed it in December 2015 and now works as an advocate, told WBUR her brain took small ordinary details and knitted them into a new and terrifying truth in which the entire city was coming for her and her daughters. She spent 12 days in the hospital. The diagnosis did not arrive until two months after she was discharged. Lithium worked. Her three children are now 13, 11 and 6.

Why the Illness Keeps Slipping Past Doctors

Roughly half of the women who develop it already have a psychiatric history, and bipolar disorder is the single biggest known risk factor. On paper, that should make a lot of these cases predictable months in advance. Three things keep them from being caught.

It has no diagnosis of its own

The DSM — the manual U.S. clinicians use to name, code and bill for mental illness — has no standalone listing for it. Dr. Susan Hatters Friedman, a reproductive and forensic psychiatrist at Case Western Reserve University, told WBUR what that absence means at the bedside.

"This is the scariest mental illness that I know of. You have these symptoms happening rapidly, you may or may not have any mental health history or any mental health literacy, and you've got this dependent little person with you — and it's not listed in the DSM."

Almost nobody is trained to spot it

Dr. Veerle Bergink, who directs the Women's Mental Health Center at Mount Sinai's Icahn School of Medicine, told WBUR that doctors simply are not trained in it and that it is massively missed. A new mother describing paranoid thoughts at a pediatric visit is far more likely to be told she needs rest than to be walked into an urgent psychiatric evaluation.

Mothers are afraid to say the words out loud

Women who sense something is badly wrong often stay silent because they fear losing custody, WBUR reported. The system compounds it. Appointments in the weeks after birth are built around the baby's weight and feeding, not the mother's mind, so the person actually in danger is rarely the one being examined.

How Common Is It, Really?

Estimates put it at one to two cases per 1,000 births in the United States. With roughly 3.6 million babies born here every year, that lands somewhere between about 3,600 and 7,200 mothers annually — a rate that, as WBUR noted, exceeds the incidence of sudden infant death syndrome. Rare is not the same thing as unlikely, and every maternity ward in the country sees it.

The Andrea Yates Case Is Still the Template

Andrea Yates drowned her five children in Texas in 2001, and her 2002 trial made postpartum psychosis a national conversation for the first time; a retrial four years later ended with a verdict of not guilty by reason of insanity. Hatters Friedman was in psychiatric training during that period. More than two decades on, the diagnosis still isn't in the manual and the training gap hasn't closed.

What Could Change After the Verdict

Clancy and her ex-husband, Patrick Clancy, have sued the medical providers who treated her, arguing they failed to diagnose and treat her condition. Those civil claims may end up mattering more than the criminal verdict, because malpractice exposure moves hospital protocols faster than awareness campaigns do. The American College of Obstetricians and Gynecologists issued guidelines in 2023 telling clinicians to screen at the first prenatal visit, again later in pregnancy and again after birth, and to treat acute cases as needing immediate care. The guidance exists. Routine practice hasn't caught up.

What to Do If You See It in Your Own Family

Treat it like chest pain. If a new mother is seeing or hearing things that aren't there, becoming convinced someone is out to get her or the baby, or has gone days without sleep despite having the chance, that is an emergency today — an ER visit or a 911 call, not a wait-and-see until the six-week checkup. In the U.S., 988 reaches the Suicide and Crisis Lifeline around the clock, free.

Ask about bipolar disorder in the family before the birth and tell the obstetrician, because that history changes the risk math for everything that follows. And watch how the Massachusetts case lands in the coming weeks. Whichever way the jury goes, the takeaway for families is the same: the treatment works almost every time, and the only thing standing between a mother and it is somebody naming what's happening fast enough.