A Massachusetts murder trial that drew national attention for nearly six weeks ended without a verdict Friday.
But one of the difficult subjects at the center of the case isn’t going away with the jury.
Postpartum psychosis.
Lindsay Clancy, a former labor and delivery nurse, was charged with murdering her three young children in the family’s Duxbury, Massachusetts, home in January 2023.
Clancy did not dispute that she killed the children.
Instead, the central legal question was whether she was criminally responsible for what she had done.
Her attorneys argued that Clancy was suffering from postpartum psychosis and was legally insane at the time of the killings. Prosecutors disputed the defense’s explanation of her mental state and argued that the killings were planned.
After seven days of deliberations, jurors couldn’t reach a unanimous verdict.
A judge declared a mistrial on September 4.
According to Reuters’ reporting on the Lindsay Clancy mistrial, prosecutors have not yet announced whether they will try the case again. Clancy remains in custody at a state psychiatric hospital, and another court hearing is scheduled for September 29.
The legal case remains unresolved.
But the trial has put a rare and potentially dangerous postpartum mental-health condition in front of millions of people who may never have heard of it.
For families, understanding what postpartum psychosis actually is—and what it isn’t—may be more useful than trying to decide a criminal case from a distance.
Postpartum Psychosis Is Not the Same as Postpartum Depression
This distinction is extremely important.
Postpartum depression and postpartum psychosis are not interchangeable terms.
The American College of Obstetricians and Gynecologists describes postpartum depression as a condition that can cause intense sadness, anxiety or despair and interfere with a person’s ability to function.
Postpartum psychosis involves something substantially different: a disruption in a person’s connection with reality.
Symptoms can include:
Hallucinations.
Delusions.
Paranoia.
Severe confusion.
Disorganized thinking or behavior.
Mania.
A person experiencing psychosis may believe things that aren’t true or see or hear things that aren’t actually present.
And unlike the more common emotional changes that can follow childbirth, postpartum psychosis is considered a psychiatric emergency.
It Is Rare—but Serious
One reason many families don’t recognize postpartum psychosis is that most will never encounter it.
Medical literature generally estimates that postpartum psychosis affects roughly 1 to 2 people per 1,000 births.
That makes it much less common than postpartum depression.
But rarity shouldn’t be confused with insignificance.
The National Institute of Mental Health describes postpartum psychosis as a psychiatric emergency because symptoms can include severe confusion, hallucinations, delusions, paranoia and mania.
In some cases, the illness can create a risk of harm to the mother or the baby.
That doesn’t mean a person experiencing postpartum psychosis will become violent.
It means the illness can severely distort someone’s perception of reality, making rapid medical evaluation important.
The Warning Signs May Not Look Like Ordinary Sadness
When families think about postpartum mental health, they may watch for crying, sadness or withdrawal.
Those can be important signs of depression.
Psychosis may look very different.
A new mother might become unusually suspicious.
She may seem intensely confused.
Her thoughts or speech may become difficult to follow.
She may hear voices or see things other people don’t.
She may develop beliefs that seem obviously untrue to everyone around her but feel completely real to her.
She may become unusually energized, agitated or behave in ways that are drastically different from her normal personality.
Sometimes the earliest changes can be less obvious.
Medical reviews have identified early symptoms such as irritability, restlessness, rapidly changing moods and severe insomnia.
That’s part of what can make recognition difficult.
A newborn already changes everyone’s sleep.
New parents are tired.
Emotions can be intense.
Life suddenly feels unfamiliar.
Those normal experiences can make an emerging psychiatric illness harder for a family to distinguish at first.
A Person Experiencing Psychosis May Not Realize Something Is Wrong
This may be one of the most important things families can understand.
We often assume that when someone becomes seriously ill, that person will recognize the problem and ask for help.
Psychosis can interfere with that ability.
ACOG notes that postpartum psychosis can involve poor insight into the illness or symptoms.
In simple terms, the person experiencing the psychosis may not recognize that her perception of reality has changed.
A delusion doesn’t necessarily feel like a delusion to the person experiencing it.
It may feel completely true.
That’s why telling someone to “get some rest” or waiting for her to decide she needs help can be dangerous when severe psychiatric symptoms are present.
Family members may need to recognize that something has changed and seek emergency help.
Certain Women Face a Higher Risk
Postpartum psychosis can occur without a previously diagnosed psychiatric illness.
But some women face substantially higher risk.
A history of bipolar disorder is one of the strongest known risk factors.
A previous episode of postpartum psychosis also raises the risk in a future pregnancy.
That makes mental-health history an important part of prenatal and postpartum care.
Someone with a known risk may be able to work with her healthcare team before delivery to develop a plan for monitoring symptoms and beginning treatment quickly if warning signs appear.
The important lesson isn’t that families should try to predict who will develop postpartum psychosis.
It’s that a history of serious mood or psychotic illness should be discussed openly with the medical professionals caring for someone during pregnancy and after childbirth.
Postpartum Psychosis Is Treatable
The frightening nature of the condition can obscure another important fact:
People can recover.
Postpartum psychosis requires professional medical treatment, and hospitalization is often necessary because doctors need to stabilize symptoms while protecting both mother and child.
Treatment can involve medications such as antipsychotics and mood stabilizers, depending on the patient’s circumstances.
Other treatments may also be considered by specialists.
The exact treatment is a medical decision and can vary considerably from patient to patient.
But early recognition matters.
A family member who notices hallucinations, delusions, extreme confusion or other signs that someone has lost touch with reality shouldn’t wait to see whether the symptoms disappear after a good night’s sleep.
The “Baby Blues” Are Something Different Again
There’s another distinction worth making.
Many women experience emotional changes shortly after giving birth that are commonly called the baby blues.
Those feelings can include crying, anxiety, irritability or feeling overwhelmed and usually improve within days or a couple of weeks.
Postpartum depression is more serious and persistent.
Postpartum psychosis is rarer still and involves a loss of contact with reality.
Those three experiences shouldn’t be placed into one broad category of “having a hard time after the baby.”
Families don’t need to become mental-health experts.
But understanding that there are meaningful differences can help them know when ordinary support isn’t enough.
What Should a Family Do if Someone Appears Psychotic After Childbirth?
Treat it as an emergency.
The National Institute of Mental Health advises that a woman experiencing symptoms of postpartum psychosis should receive immediate help.
If someone has hallucinations, delusions, severe confusion, extreme paranoia, appears disconnected from reality, or seems at risk of hurting herself or someone else, don’t leave her alone while waiting for the symptoms to pass.
In the United States, call 911 or go to the nearest emergency department when there is an immediate safety concern.
The 988 Suicide & Crisis Lifeline is also available by calling or texting 988 for crisis support.
This isn’t the moment to worry about embarrassing someone or overreacting.
Let medical professionals determine what’s happening.
The Lindsay Clancy Case Does Not Answer Every Question About Postpartum Psychosis
This distinction also matters.
The existence of postpartum psychosis as a recognized medical condition does not determine what happened in one particular criminal case.
Clancy’s defense argued that she was experiencing the condition when she killed her children.
Prosecutors challenged the defense’s interpretation of her mental state and presented a different account.
The jury heard weeks of testimony, including extensive evidence about Clancy’s psychiatric treatment and condition before the deaths.
And after seven days of deliberations, jurors couldn’t unanimously decide whether she was criminally responsible.
A mistrial isn’t an acquittal.
It isn’t a conviction.
It means this jury did not reach the unanimous decision required to resolve the case.
That legal distinction is important because families can learn about postpartum psychosis without turning a medical condition into an explanation for every fact in a contested criminal case.
There May Be Another Trial
The criminal proceedings aren’t necessarily finished.
Because the jury deadlocked, prosecutors can seek another trial.
Reuters reports that Plymouth County District Attorney Timothy Cruz has not yet announced what his office will do.
Other possibilities could potentially emerge through the legal process, but for now the charges remain unresolved.
Clancy continues to be held at a psychiatric hospital.
Her next court hearing is scheduled for September 29.
Whatever happens next will determine the legal future of this particular case.
But the broader conversation about postpartum mental health shouldn’t depend on another jury.
Families Shouldn’t Have to Learn the Words “Postpartum Psychosis” During an Emergency
That’s perhaps the most useful lesson to take from all the attention surrounding this case.
Most families prepare extensively for a baby’s arrival.
They learn how to install the car seat.
They buy diapers.
They prepare a sleeping space.
They choose a pediatrician.
They learn about feeding.
They watch for fevers.
Postpartum mental health deserves a place in that preparation too.
Not because every new mother should be frightened that she’ll develop a severe psychiatric illness.
The overwhelming majority won’t.
But because when a rare emergency does happen, recognizing it quickly matters.
Families should know that severe confusion isn’t simply exhaustion.
Hallucinations aren’t the baby blues.
Delusions aren’t ordinary postpartum anxiety.
And a new mother who appears to have lost touch with reality may not be able to recognize the danger herself.
Postpartum psychosis is rare.
It is serious.
And it is treatable.
The Lindsay Clancy trial may continue to generate arguments about criminal responsibility, psychiatric care and what happened inside one Massachusetts home in January 2023.
Those questions belong to the courts.
But there’s another question families don’t need a jury to answer:
If someone we love suddenly seems disconnected from reality after having a baby, would we recognize that she needs immediate medical help?
Knowing the answer before an emergency happens could matter enormously.
Original reporting: Reuters, September 4, 2026. Medical information was additionally checked against guidance from the American College of Obstetricians and Gynecologists and the National Institute of Mental Health.