Matrescence Is a Developmental Milestone. It's Time We Treated It Like One.

We talk a lot about adolescence. We prepare for it, brace for it, make excuses for it. When a teenager is moody, withdrawn, unrecognizable to the people who have known them their whole lives, we nod knowingly. Of course they are. Their brain is changing. Their body is changing. They are becoming someone new, and there is no going back to who they were before.

We extend so much grace to that process. We rarely extend the same to new mothers.

What Is a Developmental Milestone?

A developmental milestone is a significant, irreversible shift in how a person thinks, feels, relates, and moves through the world. These are not phases. They are not regressions or disruptions. They are the expected, necessary transitions that mark the progression of a human life.

Erik Erikson, one of the most influential psychologists to study human development across the lifespan, argued that development does not stop at childhood. His theory of psychosocial development mapped eight distinct stages from infancy through late adulthood. Each stage presents a central conflict. Each resolution reshapes the person who moves through it. And critically, each stage is cumulative. You do not go back. You carry what you have become into everything that follows.

Erikson understood something important: we are not the same people at 40 that we were at 20, and we were not the same at 20 that we were at 12. Development is ongoing, layered, and permanent. Growth does not ask permission, and it does not offer a return policy.

Adolescence as the Template We Already Understand

Puberty is perhaps the clearest example of a developmental milestone most people can recognize. The hormonal shifts are dramatic. The neurological rewiring is real and measurable. The emotional landscape changes completely. A child who was easygoing becomes someone their parents do not always recognize. Old coping strategies stop working. New needs emerge. The body itself is different.

And we accept this. We do not tell a 16-year-old to go back to being 11. We do not describe the goal of adolescence as returning to the person they were before it started. We understand, intuitively, that they are becoming. That who they are on the other side of this transition is who they are now. The child version of them is not gone, exactly, but it has been integrated into something new and larger.

We adapt how we relate to them. Parents who parent a 10-year-old differently than they parent a 16-year-old are not inconsistent. They are paying attention. They understand that the relationship has to evolve because the person has evolved.

Matrescence Is the Same Process

The term matrescence was coined by anthropologist Dana Raphael in the 1970s and later expanded by reproductive psychiatrist Alexandra Sacks. It describes the developmental transition a woman undergoes when she becomes a mother. Like adolescence, it involves significant hormonal shifts, neurological changes, and a profound reorganization of identity.

Research has shown that pregnancy and the postpartum period reshape the brain in ways that are both measurable and lasting. Gray matter changes. Threat detection sharpens. The sense of self reorganizes around a new relational reality. A mother's brain, quite literally, is not the same brain she had before.

And yet, the cultural narrative around new motherhood is almost entirely focused on returning. Bouncing back. Getting back to yourself. Recovering. The language implies that the woman who existed before is still in there, waiting, and that the work of the postpartum period is to excavate her.

She is not in there waiting. She has become someone else. That is not a problem. That is the point.

Why the "Bounce Back" Narrative Is Harmful

When we frame postpartum recovery as a return to a prior self, we set women up for a kind of grief that has no name and no cultural container. They are told to feel like themselves again, but the self they feel like is not who they were before. That gap, between who they expected to return to and who they actually are, is often where shame, confusion, and disconnection take root.

This is not a symptom of something gone wrong. It is the disorientation of a major developmental transition that has been mislabeled as a temporary disruption.

We would not hand an adolescent a photo from fifth grade and say, try to feel like her again. The expectation itself would be recognized as absurd. But we do something very close to that with new mothers, and we rarely question it.

What This Means for Relationships

Here is where matrescence becomes a relational issue as much as an individual one.

Adolescence changes not just the teenager but the entire family system around them. Parents have to learn to parent a new version of their child. Siblings adjust. The dynamics shift. No one expects the family to relate to the teenager the way they related to the 10-year-old. That would miss the person standing in front of them.

The same is true in partnerships when a woman becomes a mother. She is not the same partner she was before, and that is not a failure of the relationship or a sign that something has been lost. It is a signal that the relationship has an opportunity to evolve alongside her.

Partners who are given the framework of matrescence, who understand that what they are watching is a developmental transition rather than a personality change or a withdrawal, often respond with more patience, more curiosity, more capacity to stay present through the disorientation. The framework matters. It changes what the moment means.

When we extend to mothers the same understanding we already extend to adolescents, something shifts. The woman in the transition stops feeling like a problem to be solved and starts being seen as a person becoming.

You Found This Post for a Reason

Maybe you are in the middle of this and nothing feels like it fits anymore. Maybe you are the partner reading this with a quiet sense of recognition, finally having words for something you have been watching without knowing how to name it. Either way, if this landed for you, you do not have to keep making sense of it alone.

This is exactly the work I do with women moving through matrescence and the partners who love them. If you are ready to understand what is happening and figure out how to grow through it together, I would love to connect. You can learn more about working with me here.