By KiddieDaily Editors · 2026-06-29 · 3 min read · 1 source

Parenting may permanently improve brain health for mums and dads

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When you are pregnant, everything changes.

Hormones surge, your belly swells, cravings kick in. Until recently, the story was assumed to end there – that once the physiological and hormonal upheaval of pregnancy and birth resolves, the body and mind largely return to a pre-pregnancy state. It is clear now that this isn’t true.

During pregnancy, another transformation unfolds. Inside the skull, the brain quietly remodels itself in ways that shape a mother’s ability to care for her child. Far from being temporary, many of these changes persist for years – perhaps even a lifetime.

This phenomenon isn’t restricted to the person who gives birth, either. Fathers’ brains also experience changes during the transition to parenthood. “Few brain regions go untouched,” says Emily Jacobs, a professor of neuroscience at the University of California, Santa Barbara.

Scientific consensus about the parental brain has undergone a profound shift in the past decade. What was once dismissed as “mum brain” – a forgetful, sleep-deprived state offset by an almost superhero-like vigilance for your child – is now understood as something more complex: a combination of highly orchestrated neurological adaptations that may influence everything from empathy and attention to memory and even Alzheimer’s risk. What is a ‘normal’ memory slowdown, and when should I worry?

From the earliest stages of pregnancy, grey matter – the brain tissue packed with neuronal connections – begins to change. In many regions, it shrinks as connections are pruned. Researchers stress that this isn’t a sign of damage, but of fine-tuning.

“Think of Michelangelo’s David, where the underlying beauty is revealed through the art of removal,” says Jacobs. A series of studies – including one in which Jacobs and her colleagues scanned a woman’s brain 26 times from pre-conception to two years after birth – show that the most striking transformations occur within the default mode network, a system involved in self-reflection, planning, and emotional and social cognition. Your science-backed guide to the easy habits that will help you sleep well, stress less, eat smarter and age better.

These changes are linked with how easily a mother connects with her baby and how strongly she responds to her child’s cues – the greater the changes, the greater the bond. “The brain is becoming more specialised, rather than impaired,” says Lauren Mahoney, a psychologist at City University of New York. “[It] appears to prioritise information that is relevant to caregiving, threat detection, emotional interpretation and rapid environmental monitoring.” New mums will recognise this phenomenon – while they may forget where they placed their keys, they are remarkably attuned to subtle changes in their baby’s breathing or demeanour.

Jacobs and her colleagues are now studying the brains of other first- and second-time mums, alongside fathers and those who have never been pregnant. In unpublished work, they found that 97 per cent of the 400 brain regions examined changed significantly during a first pregnancy. Second-time mums, meanwhile, showed less dramatic shifts, having only partially rebounded in the postpartum period.

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