Parental separation and children’s mental health are tightly linked in new Australian research, and the number is hard to look away from. Children who experience parental loss, a category that includes separation, a parent in custody, or a parent’s death, are about twice as likely to have a diagnosable mental health disorder as children living with both parents (Curtin University, 2026).
That finding lands in the rooms where I sit with parents every week. A child is melting down at bedtime, refusing school, picking fights, withdrawing, or circling through worry that will not settle. The grown-ups do what loving parents do. They zoom in on the child’s behavior. They search for the right consequence, the right school plan, the right diagnosis. They work hard.
What they often do not do is look at the climate the child is growing in.
A child’s nervous system reads the household the way a plant reads weather. Warmth, repair, and a steady bond between parents is one kind of weather. Distance, contempt, or a split home with leftover bitterness is another. The child’s symptoms are frequently the first visible sign that the weather has changed.
You Want Your Child to Feel Secure
You want a child who can rest. A child who can play without scanning the room. A child who does not feel responsible for adult moods. You want evenings that are ordinary. You want your son or daughter to grow up knowing what it looks like when two people stay with each other through friction and still come back.
That is not a luxury. It is one of the most reliable forms of protection a family can offer.
This Guide Gives You the Number, the Why, and the Work That Helps
Below you will find the Curtin findings in plain language, the most plausible explanations for why parental separation and children’s mental health travel together, and a case I make often in my work. Building an intimate, workable marriage is one of the most important parenting tools we have, and it is the one parents neglect first. Child behavior is often downstream of a fractured bond between the adults.
Parental Separation Nearly Doubles Children’s Mental Health Risk
Researchers at Curtin University analyzed national survey data from more than 6,300 Australian households with children ages 4 to 17. They defined parental loss as the death of a parent, parental separation, or a parent in custody. By age 17, nearly one in three children had lived through parental separation (Curtin University, 2026).
The mental health gap is clear.
| Family situation | Children with a mental disorder | Comparison group |
|---|---|---|
| Any parental loss (death, separation, or custody) | 21.4% | 10.8% with no parental loss |
| Not living with both biological parents | 21.3% | 10.8% living with both parents |
| Parents separated | 20.2% | 11.9% whose parents had not separated |
| Parent in custody | 21.9% | 13.9% without a parent in custody |
| A parent has died | 28.8% | 13.7% who had not lost a parent to death |
| Parents separated | Parents had not separated |
|---|---|
| 20.2% of children had a mental disorder | 11.9% of children had a mental disorder |
Lead author Professor Lauren Breen put it simply. Parental loss is more common than many people realize, and it has a clear, measurable impact on children’s mental health (Curtin University, 2026).
Two notes keep the statistic honest. First, the “twice as likely” headline belongs to the broader parental-loss group. Separation on its own still nearly doubles the rate, 20.2% versus 11.9%. Second, most children of separated parents do not develop a disorder. About four in five do not. The elevation in risk is real. It is not destiny.
The disorders named in the study include anxiety, depression, and ADHD. That mix matters. Some of what we call a child’s “problem” is temperament. Some of it is grief. A great deal of it is the child’s attempt to stay oriented in a home that no longer feels held together.
Why Parental Separation Raises Children’s Mental Health Risk
A study like this cannot prove that separation itself caused every extra diagnosis. Families who separate already differ from families who stay together. Conflict, money strain, and a parent’s depression can sit on both sides of the ledger. Still, the pattern is stubborn across countries and decades. When parents come apart, children’s rates of anxiety, depression, behavior problems, and later adult distress rise (Auersperg et al., 2019).
Several explanations sit together. None of them needs to be the only one.
Children’s Safety Depends on Whether Parents Still Belong to Each Other
Children do not experience “family structure.” They experience whether the people who keep them alive still belong to each other. When that belonging breaks, many children feel the ground move. Some become clingy. Some become fierce. Some go flat. Underneath the different surfaces is often the same question. Who is going to stay?
Research on children after high-conflict splits finds that fear of being left behind is one of the bridges between adult fighting and later mental health problems. Conflict raises that fear. The fear then feeds anxiety and low mood (Child and Family Blog, summarizing Wolchik and colleagues).
Children’s Distress Often Starts Before the Separation
Children in homes that later separate already show more distress before the official split. A Canadian study found higher depression, antisocial behavior, and hyperactivity in children whose parents would later divorce, much of it tied to family strain that was already in the house (Strohschein, 2005).
That is an uncomfortable finding if you want a simple story. It is a clarifying one if you work with families. The child’s behavior is often a report on the marriage long before anyone uses the word separation.
Marital Conflict Makes Parents Less Available
When two adults are at war or frozen at a distance, warmth leaks out of the parent-child relationship. Patience shortens. Rules get inconsistent. One parent may pull the child close as an ally. The other may pull away. A large body of work shows that marital conflict travels into parenting, and that this “spillover” is one of the main paths from adult strain to child symptoms (van Dijk et al., 2020).
The child is not only watching a fight. The child is receiving a less available parent.
Separation Thins the Child’s Daily World
Separation often means two households, less money, more transitions, and less adult bandwidth. Those are not small things to a six-year-old who needs bedtime to be the same most nights. Follow-up research finds that drops in the home environment, parental sensitivity, and income help explain why some children’s problems rise after a split (Weaver and Schofield, 2015).
Children Get Recruited Into Adult Emotional Work
In a strained marriage, children are often asked, without anyone meaning to ask, to carry feelings that belong to the adults. They soothe a lonely parent. They keep secrets. They translate messages. They learn to read faces the way a weather vane reads wind. That work can look like maturity. It is usually costly. Parts of the child that should be free to play, protest, and need things get pushed out of view so the family can keep functioning.
A Healthy Marriage Is a Parenting Tool Parents Neglect
Working on the marriage can feel selfish when a child is struggling. It is one of the least selfish things you can do.
An intimate marriage is not a lifestyle extra. It is a resource that feeds the child from two directions at once. Directly, the child lives inside a climate of repair and belonging. Indirectly, each parent becomes more available because someone is holding them too.
Paul Amato’s long line of research is blunt on this point. Children raised by two continuously married parents, on average, have fewer cognitive, emotional, and social problems in childhood and later in adulthood. The advantage is not magic. It comes from stability, resources, and, when the marriage is decent, lower exposure to chronic hostility (Amato, 2005 overview).
Marital quality over years predicts children’s inner distress, outward behavior problems, health, and even academic scores. Children whose parents stay in a consistently poor marriage do worse than children whose parents stay in a consistently stronger one (James and colleagues, 2022).
The tool is not “stay married no matter what.” The tool is a living bond that can take heat and still return to warmth.
An Intimate Marriage Protects a Child in Direct and Indirect Ways
An intimate marriage is one where the adults still turn toward each other. They can fight and repair. They can want each other. They can tell the truth without using the child as a messenger. That kind of bond helps a child in ways that are easy to miss because they look like ordinary life.
An Intimate Marriage Helps the Child Directly
- A stable emotional climate. The child’s body learns that closeness can hold. That lesson becomes the template for later friendships and love.
- A model of rupture and repair. Kids need to see two people get it wrong and come back. That is how they learn that conflict is not the end of belonging.
- Freedom from the referee role. When parents stay a couple, the child does not have to pick a side or manage the temperature in the room.
- A protected child role. Adult intimacy, including a private sexual and emotional life, draws a boundary. The child gets to be a child instead of a stand-in partner.
- Two minds on the same child. Parents who can think together notice sooner when a child is fading or flaring. They are less likely to contradict each other in ways that leave the child stranded.
- Everyday predictability. Shared routines, shared rules, and a shared story about “how we do things here” lower the load on a child’s attention and mood.
An Intimate Marriage Helps the Child Through You
- Parents who are less depleted. Being known by a partner restores patience that parenting spends all day.
- Better mental health in the adults. A supported parent is a steadier parent. When a mother’s depression lifts, children’s symptoms often ease as well (STAR*D-Child).
- Warmth that spills toward the child. The same current that runs between partners tends to run toward kids. Distance between partners tends to run that way too.
- A shared practical load. Money, logistics, nights up with a sick child, and the invisible work of running a house are lighter when two people are truly on a team.
- Less loneliness in the parent who would otherwise lean on the child. Children should not be the main source of comfort for an adult.
- A longer horizon. Parents who feel held can think in years, not only in tonight’s crisis. That changes how they respond to a hard season in a child’s life.
Think of the marriage as the riverbed. Parenting is the water the child drinks. If the bed is cracked, the water still reaches the child, but it arrives muddy and thin. Repair the bed, and the same parenting effort goes further.
High-Conflict Marriages Are a Different Problem
Honesty requires a second paragraph that many marriage articles skip.
When a marriage is marked by chronic, open hostility, children can do better if the adults separate and then stop using the child as a battlefield. Longitudinal work by Amato and colleagues found that children in high-conflict homes often fare better after a split, while children in low-conflict homes often fare worse if that marriage ends (Amato, Loomis, and Booth, 1995). A later review made the same point. Intense, unresolved conflict is its own harm. Ending that conflict can be a relief (Amato, 2001).
After a split, conflict still matters. Children exposed to frequent, intense fighting in the first years after divorce were more than two and a half times as likely to have a mental health disorder six years later as children whose divorced parents fought less (Child and Family Blog).
So the takeaway is not “never separate.” The takeaway is that the child’s risk tracks the loss of a safe adult bond and the presence of ongoing war. A cold, contemptuous marriage is not the protective factor. A living one is.
If you are already separated, the parenting work does not disappear. It moves. Protect the child from adult grievance. Keep both parents in the child’s life when it is safe. Repair your own inner life so the child does not have to.
Use the Marriage as Care. These Moves Help.
- Look upstream before you overhaul the child. Ask what the child is living inside. Behavior is information. It is often information about the bond between the adults.
- Treat marital repair as parenting. Couple work, honest conversations, and the recovery of warmth are not a detour from the child’s needs. They are one of the shortest paths to them.
- Watch for drift, not only open warfare. Many separations now follow low-conflict distance, not years of fighting. Those endings can shock a child who thought the home was solid.
- Stop using the child as a regulator. If you reach for your son or daughter when you need comfort that belongs with a partner or a friend, that is a signal. Get adult support.
- If you stay, stay in a way the child can feel. Sharing a roof while living as strangers teaches the child that love is a performance. Shared meals, repaired fights, and ordinary affection are what register.
- If you leave, leave the war. Two decent homes beat one house filled with contempt. Two homes filled with contempt help no one.
- Get help early, for the marriage and for the child. Deep patterns rarely yield to a podcast and good intentions. A skilled therapist can help you see the parts of you that go cold, go sharp, or go away when closeness gets real.
Unresolved Distance Costs a Family Every Day
When the adult bond stays fractured, everyone pays in small daily coins. The child spends energy monitoring. One parent becomes the exhausted manager. The other becomes the outsider or the critic. Evenings get shorter on warmth and longer on logistics. School problems gather. Sleep thins. The family starts organizing around the child’s symptoms because those symptoms are the one thing everyone can agree is “the issue.”
That is a hard place to live. It is also a place many families leave, not all at once, but by turning back toward each other in specific, ordinary ways.
You do not have to become a perfect couple. You do have to become a couple the child can locate. Step-by-step repair helps. For many people, that repair needs another person in the room who can slow the old dance down and help the hidden hurts come forward without more shame. That is not failure. That is how deep work usually happens.
A child can grow in a home where the adults keep choosing each other. Even after a hard season. Even after you have already gotten it wrong. The statistic is a warning. It is also an invitation to tend the bond that was meant to hold the whole household.
FAQ on Parental Separation and Children’s Mental Health
Does parental separation cause children’s mental health problems?
Separation is strongly associated with higher rates of anxiety, depression, ADHD, and other disorders. It does not, by itself, prove cause in every family. Conflict before the split, money strain, and parent mental health all play a part. The Curtin study shows a clear elevation in risk, not a single-cause story (Curtin University, 2026).
Are children of separated parents twice as likely to have a mental health disorder?
In the Curtin data, children with any parental loss (separation, custody, or death) had disorders at 21.4% versus 10.8%. That is about double. Children whose parents had separated had disorders at 20.2% versus 11.9%, which is nearly double.
Should we stay together for the kids?
Stay if you can rebuild a climate of respect, warmth, and repair. Leave if the home is a site of chronic hostility, fear, or contempt and that climate will not change. Children tend to do worse when a low-conflict marriage ends, and better when a high-conflict marriage ends and the fighting actually stops (Amato, Loomis, and Booth, 1995).
Why does my child act out more since we started having marriage trouble?
Children often show the strain before adults name it. They lose sleep, get sharp, cling, or shut down because the people they depend on are less available to each other and therefore less available to them. The behavior is frequently a signal, not the root problem.
Can a good coparenting relationship after separation protect my child?
Yes. Quality of parenting, a warm parent-child bond, and lower hostile conflict are the three family processes most tied to how children fare after a split (Clark, 2013). Cooperation after separation cannot replace what a living marriage offered, but it can prevent a second injury.
Is it too late if we are already separated?
No. The child’s risk is not a verdict. Reducing conflict, keeping both parents safely involved, restoring routines, and getting support for your own grief still change the weather the child lives in.
Does working on our marriage really count as parenting?
Yes. An intimate, workable marriage is one of the largest hidden inputs into a child’s mental health. It shapes the child’s sense of safety, the parents’ patience, and the story the child will later carry into their own close relationships.
