In 1978, when Louise Brown was born in the United Kingdom — the world's first IVF baby — the medical community was roughly split down the middle. Some spoke of a revolution. Others, of a catastrophe. That same year, American bioethicist Leon Kass published an essay arguing that children born with the help of donor material would grow up without a sense of identity, without roots, burdened by inevitable psychological damage. This was not merely an opinion — it was the consensus of a significant part of the academic world.
Nearly fifty years have passed. Louise Brown lives in Bristol, works, and has her own children, conceived naturally. Over these decades, enough evidence has accumulated to say: Kass was wrong not because he was incompetent, but because he asked the wrong question. "What will be wrong with these children?" is a dead end. The right question is different: what actually determines a child's psychological wellbeing, and how does it relate to family structure?
Science's answer turned out to be both more complex and more encouraging than the sceptics had expected.
Psychologist Susan Golombok of Cambridge University spent more than thirty years studying children from non-traditional families — those with same-sex parents, single parents, conceived using donor material, born to surrogate mothers. Her studies, carried out over several decades — from the 1980s through the 2010s — and covering hundreds of families across multiple countries, produced one of the most cited findings in the field: family structure alone is not a significant predictor of a child's psychological wellbeing.
This means: a child in a donor family or a co-parenting family with two engaged, mutually supportive adults has a better psychological prognosis than a child in a "complete" family marked by chronic conflict. Family structure is the context. The quality of relationships within it is what actually determines the outcome.
John Bowlby, who developed attachment theory in the 1950s and 60s, described how early relationships with caregiving adults shape a person's emotional foundation. His work was often interpreted as proof that a child needs one "primary" adult — typically the mother. But such a reading of Bowlby simplifies his ideas beyond recognition.
Bowlby himself never wrote that this adult must be exclusively the biological mother. Moreover, subsequent work by researchers in the field — most notably Mary Ainsworth, who developed the concept of "secure attachment" — showed that a child can form reliable attachments to several adults simultaneously. What matters is not the uniqueness of the attachment figure, but its qualities: predictability, sensitivity, consistency.
In co-parenting families where both parents are actively involved in the child's life, the child has the opportunity to form a secure attachment to both. This is no worse than in a traditional family. In some respects it is richer: from an early age, the child learns that closeness can take different forms — and this deepens their emotional engagement for life.
Anthropologist Sarah Blaffer Hrdy, in her work on the origins of human altruism, points to something even more fundamental: Homo sapiens was originally a species with "cooperative breeding" — to use her term. Our ancestors raised children through shared effort for millennia: not two people enclosed in one house, but several adults with distinct, stable roles in a child's life. The nuclear family of two biological parents sealed inside a separate home is a historically recent and far from universal phenomenon. A child raised by several adults is not a deviation from the norm. It is one of the original norms of human society.
Whether to tell or not to tell — science settled that question long ago. Tell. Twenty years of research show unambiguously: children who learn the truth about their origins in late childhood or adulthood — especially by accident — cope with it significantly harder than those for whom the donor story was part of the ordinary family narrative from the very beginning.
The question of how is far more interesting, and the answer depends on age.
At this age, children do not yet understand biology, but they take in stories very well. This is when the emotional backdrop forms — the one in which this story will live in the child's mind for years to come.
Simple words that work: "To bring you into the world, we had help from a kind person — a donor. They gave a tiny cell, and from it you grew." Children this age receive such stories calmly and naturally — precisely because they have no "normal" model yet to compare it against.
Children begin comparing their family to those of their friends. "Why don't I have a dad?" or "Where does my other dad live?" — these are not existential crises; they are cognitive work: the child is building a map of the world. A ready narrative about the donor becomes an answer rather than a shock.
Psychologists recommend responding calmly and with confidence — children read parental anxiety and begin to perceive the subject as forbidden or dangerous. If the conversation itself is neutral, the child will be neutral too.
At school age, children begin to understand biology. More complex questions arise: "Is he my real dad?", "Can I meet him?", "Why didn't he want to be my parent?"
Psychologists recommend honest, measured answers: "He didn't become your parent because his role was different — to help us become a family. Your family is us." There is no need to explain everything at once. Answer the questions the child actually asks — not the ones you anticipate.
Adolescence is by definition the time for rethinking who you are. The subject of donor origin inevitably resurfaces. A teenager may want to learn more about the donor, find them, make contact — this is a normal expression of identity formation, not a sign that something has gone wrong.
Research by Joanna Turner of the University of Surrey (2018) showed that teenagers raised with an open family narrative about donor conception cope significantly more easily with the phase of identifying with the donor — they do not feel that doing so betrays their family. Teenagers who learned the truth later often experience a sharp sense of betrayal — not from the donor, but from their parents.
The adult's role during this period is not to defend territory or redirect interest. It is to remain open to conversation — about whatever the teenager raises. If a teenager wants to find the donor — this is not grounds for prohibition, but grounds for an honest conversation.
Children in co-parenting families grow up with two homes, two parents who are not a couple, and often with questions from peers. Research shows that this configuration is not in itself a source of problems. What matters is how the adults inhabit it.
Absence of open conflict between parents. Children pick up tension between adults very acutely — they do not need to hear an argument. A shift in tone, a prolonged pause, a glance cast over their head is enough. A child who senses that their attachment to one parent somehow diminishes the other lives in a state of constant internal conflict — and this takes its toll.
This is one of the most studied stress transitions in co-parenting families. Research by family psychologists — notably the work of Pamela Brubaker and Carolyn Cowan — shows that children accept a parent's new partner more easily when the introduction happens gradually, without pressure and without immediate expectations of "family" behaviour.
Principles that work: the first meeting in a neutral, low-key context, not at home; no labels like "new mum" or "new dad" — these put the child in an awkward position and complicate relations with the other parent; the new partner does not replace the second parent or lay claim to their place in the child's life; the child needs time to adapt without forced bonding.
What never works: drawing the child into conflict between the parents over the new partner. The child should not know that one parent is unhappy with the other. That is not their burden to carry.
This article offers general guidance based on scientific evidence. It does not replace work with a child psychologist, family therapist, or psychiatrist.
There are signs that mean a specialist visit should not be put off: the child avoids any conversation about family or origin and is visibly tense; regression appears — they stop doing things they had already mastered; sleep or appetite is disrupted without apparent cause, and this goes on for several weeks; aggression increases, or the child withdraws sharply into themselves. None of these signals falls into the "it'll pass on its own" category.
The table below is not a prescription, but a guide. Every child and every family is unique; what works for some will need adjusting for others.
Science did not find what critics feared fifty years ago. Children from donor families and co-parenting families do not grow up with predetermined psychological problems. They grow up differently — as all children do — and their wellbeing is determined by the same factors as any other child's: the quality of attachment, the absence of chronic conflict, the presence of a stable world around them.
What matters is telling the truth early and without anxiety. Building the relationship between co-parents so that the child does not end up caught between two worlds that cannot find common ground. Staying ready for conversation at any age — especially when it is not easy.
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