There is a word I want to introduce you to. It is not widely known outside of research circles and the small but growing community of people talking honestly about the full experience of becoming a mother. The word is matrescence.
It was coined by medical anthropologist Dana Raphael in 1973 and has only recently begun to receive the scientific and cultural attention it deserves. It refers to the developmental process of becoming a mother — a process as profound, as disorienting, and as neurologically significant as adolescence.
Adolescence, we recognize. We expect it to involve mood swings, identity disruption, a sense of not fully knowing who you are, confusion about your place in the world. We build educational curricula around it. We write books about it. We give adolescents enormous social permission to be in a transitional, uncertain, not-quite-formed state.
Matrescence receives almost none of this recognition. The cultural narrative is that becoming a mother is a moment, not a process. You had the baby. You are a mother now.
You adjust. You get on with it.
But the research tells a completely different story — one that every mother deserves to know.
The Neuroscience of Becoming a Mother
In 2016, a landmark study published in Nature Neuroscience scanned the brains of first-time mothers before and after pregnancy and made a discovery that was both extraordinary and almost entirely absent from the cultural conversation: pregnancy produces significant, lasting structural changes in the human brain.
Specifically, the study found reductions in gray matter volume in regions associated with social cognition — the ability to understand the mental states, emotions, and intentions of others. At first glance, this sounds like a loss. It is not. The researchers found that these changes were targeted and functional: the brain was pruning and refining the neural networks responsible for theory of mind — the precise cognitive capacity needed to attune to an infant who cannot yet communicate in words, to anticipate needs, and to read emotional states from micro-expressions and behavioral cues.
The maternal brain was not degrading. It was specializing.
But specialization has a cost. The resources allocated to this new, intensive form of social processing are resources redirected from elsewhere. And “elsewhere” often includes the cognitive capacities mothers most visibly and distressingly notice declining: working memory, verbal fluency, and the ability to hold a complex train of thought without losing the thread.
The fog is real. The forgetting is real. The sense of not being quite as sharp as you used to be is real. And it is not a malfunction. It is a feature of a brain that has just undergone one of the most significant reorganizations of adult life.
The Identity Dimension That Science Is Only Beginning to Measure
The neurological changes of matrescence are accompanied by something that is harder to measure but just as significant: a profound shift in identity.
Adolescents expect to feel confused about who they are. They have cultural permission for that confusion. Mothers almost never do. The expectation — internalized from a thousand cultural messages — is that you become a mother and you feel complete. That the love is immediate and total, the purpose is clarified, and the identity question is answered.
And the love often is immediate and total. And the purpose does clarify in some ways. And the identity question is definitively not answered — it is, in many cases, reopened at a depth it has not been opened since early adolescence.
Who am I now, beyond this role? What do I want that is separate from what I provide? Where did the person I was before go — and is she gone, or is she somewhere underneath all of this, waiting?
These questions are not neurotic. They are not signs of ingratitude or insufficient maternal love. They are the normal, expected questions of a person undergoing a genuine developmental transition — a transition for which our culture offers almost no support, no narrative, and no permission to find difficult.
“Mommy Brain” Is Not What You Think
The term “mommy brain” is used casually, usually to describe forgetfulness, distraction, and cognitive lapses. It is used with a lightness that obscures something important: the cognitive changes of early motherhood are documented, measurable, and connected to specific neurological processes.
What is often described as mommy brain is the experience of a prefrontal cortex that is being asked to perform at its previous level while simultaneously managing a new set of extraordinarily high-stakes, high-complexity demands, on significantly less sleep, under elevated cortisol, with diminished neurological resources allocated elsewhere.
The working memory decline, the difficulty concentrating, and the losing of words mid-sentence — these are real. They are also not permanent, not a sign of intellectual decline, and not the full picture of what the maternal brain has become. Research consistently shows that the maternal brain gains in emotional intelligence, threat detection, motivational processing, and the nuanced social cognition required for the care of another human being.
You did not become less intelligent. You became differently intelligent. And the parts that feel less available right now are operating under conditions that would impair cognitive function in any person — regardless of whether they had children.
The Long Game of Matrescence
Here is what is not talked about enough: matrescence does not end in the newborn phase. It is not a one-time event. It recurs — in some form — at every significant transition of motherhood.
The return to work. The weaning from breastfeeding. The first day of school. The teenager who no longer needs you in the same way. The child who leaves home. Each of these transitions involves a renegotiation of identity, a recalibration of purpose, and a revisiting of the question:
Who am I now?
The mothers who struggle most are those who were never given the framework to understand that this is normal developmental territory — that the disorientation and the sense of not quite knowing who you are is not a crisis, it is a passage. That on the other side of it is a self that is larger, more complex, and more integrated than the one that entered.
But the passage requires active navigation. It does not simply happen to you. And the navigation requires time, support, and the specific kind of work that addresses identity — not just logistics, not just symptom management, but the question of who you are becoming.
What This Means for How You Take Care of Yourself
Understanding matrescence changes the framing of maternal health in an important way.
The question is not just: How do I get back to who I was before? That woman is gone — not in a devastating way, but in the way that the adolescent you were is gone, replaced by something more developed.
The question is: Who am I becoming? And what does this new version of me actually need?
She needs the neurological restoration that comes from adequate sleep, from genuine nervous system recovery, from the reduction of the chronic cognitive overload that is consuming resources her brain needs for its own reorganization.
She needs permission — real, structural, non-negotiable permission — to be in a transitional state without performing completion. To not know who she is yet, and to be supported in that not-knowing rather than rushed through it.
She needs the identity work. Not as a luxury. Not as something to get to when the children are older. But now — because the brain is reorganizing now, and the identity that emerges from that reorganization is shaped by what she is given space to explore during the process.
This is the work of the final step of the CLEAR Method — Reclaim Your Identity. Not because identity reclamation is an afterthought, but because it is the destination. Everything else — the nervous system regulation, the metabolic restoration, the load reduction — is in service of the woman who emerges.
You Are Not Lost. You Are In Between.
If you have felt, at any point in your motherhood, that you no longer recognize yourself — that you have somehow become a stranger in a life that should feel like yours — I want you to know that this is one of the most common and least-discussed experiences in maternal life.
You are not lost. You are in the middle of a developmental transition that your culture does not have adequate language for, that your doctor did not prepare you for, and that no one told you was coming.
You are in between. And in between is not the end. It is the passage.
- Read about the CLEAR Method — including the identity reclamation step.
- Download the Free Mom Checklist as a starting point.
- Join the Group Coaching Program — a community of women navigating this passage together.
- Contact Dr. Manisha to talk about where you are.
Dr. Manisha Ghimire is a board-certified physician, obesity medicine specialist, and the founder of Momkinz. Momkinz is a coaching platform, not a medical practice. This content is educational and does not constitute medical advice, diagnosis, or treatment.