A mother holds a crying newborn while everyone around her seems to expect the same response: she will pull the baby close, whisper something soothing, and somehow know exactly what to do.

Sometimes that happens.

But sometimes the mother looks at her baby and feels fear, anxiety, confusion, or even emotional emptiness. She may care deeply about the child’s safety while still feeling no sudden wave of tenderness. When society describes maternal love as automatic, these experiences can leave a woman wondering whether something is wrong with her.

The reality is more complicated—and far more human.

What Do We Mean by “Instinct”?

In biology, an instinct is generally understood as an inborn pattern of behavior that does not have to be taught. A spider does not take lessons before building a web. Certain animals migrate or protect their young without consciously learning every step.

Human parenting, however, cannot be reduced to one automatic program.

Pregnancy prepares the body and brain for caregiving, but preparation is not the same as guaranteed emotional attachment. Human love develops within a larger system that includes biology, personal history, mental health, relationships, culture, safety, and daily experience.

Pregnancy Really Does Change the Brain

Motherhood is not purely a social role; pregnancy produces measurable biological changes.

A large longitudinal study published in 2025 followed 179 women before, during, and after pregnancy. Researchers found an average 4.9% decrease in cortical gray-matter volume during pregnancy, followed by partial recovery during the first six months after birth. The pattern affected widespread areas of the brain and was associated with changing estrogen levels.

A decrease in gray matter does not mean that the brain is becoming damaged or less capable. Researchers believe that some of these changes may reflect a process of refinement or reorganization as the brain adapts to new social, emotional, and caregiving demands.

Earlier research also found lasting changes in areas involved in understanding other people’s thoughts, emotions, and intentions.

Pregnancy hormones change dramatically as well. Estrogen, progesterone, prolactin, and oxytocin all participate in childbirth, breastfeeding, stress regulation, and social connection.

Oxytocin is often called the “love hormone,” but that nickname can be misleading. It does not simply switch love on. Its effects depend on the person, the situation, previous experiences, stress, and the surrounding relationship. Oxytocin may support closeness and caregiving, but it cannot guarantee that a mother will immediately feel bonded to her baby.

Why Isn’t Love Always Immediate?

If the brain and hormones are changing, why do some mothers still feel emotionally distant?

Because biology creates a capacity for caregiving—not a promise of instant attachment.

Studies consistently connect postpartum psychological distress with difficulties in mother-infant bonding. Depression, anxiety, traumatic childbirth, exhaustion, lack of sleep, financial pressure, relationship conflict, and limited practical support can all interfere with a mother’s ability to feel emotionally available.

In one study, postpartum depression affected approximately 13% of participants, while about 21% showed signs of bonding difficulties. A more supportive coparenting relationship was associated with better maternal mental health and stronger bonding.

These numbers do not mean that every mother with depression will struggle to love her child. They show that emotional connection is influenced by real psychological and social conditions.

A woman who is frightened, isolated, physically unwell, financially overwhelmed, or recovering from trauma may be operating in survival mode. Her nervous system may be focused on getting through the next hour rather than producing the warm emotional response she expected.

That does not make her a bad mother.

The Environment Matters

The expectation of effortless motherhood often ignores a basic truth: caring for a newborn requires support.

A mother may have a loving partner, paid leave, reliable health care, financial stability, and family members who allow her to sleep. Another mother may face the same biological demands while living with financial insecurity, chronic illness, relationship conflict, or almost no practical help.

It would be unrealistic to expect these two women to have identical emotional experiences.

Social support during pregnancy and after birth is associated with lower postpartum distress. Partner support, in particular, may protect maternal mental health and reduce some of the pressures surrounding early parenthood.

This is why conversations about maternal attachment should not focus only on what a woman is supposed to feel. They should also ask:

• Is she sleeping?
• Does she feel safe?
• Does someone help her without criticizing her?
• Can she receive medical and mental health care?
• Does she have time to recover?
• Is she carrying unresolved trauma from her own childhood?

Maternal well-being does not develop in isolation.

Caregiving Changes Fathers’ Brains Too

Another reason to question the idea of an exclusively female maternal instinct is that caregiving also changes the brains and behavior of fathers.

Research comparing primary-caregiving mothers, secondary-caregiving fathers, and fathers who were the primary caregivers found that all groups used brain systems involved in emotional processing and social understanding. Fathers who provided more direct care showed stronger coordination between these systems.

This suggests that the parental brain is shaped not only by pregnancy but also by repeated caregiving.

The same principle can apply to foster and adoptive parents. Research involving foster mothers found associations among oxytocin, brain responses to the infant, and affectionate caregiving behavior. These patterns appeared to develop through interaction and growing familiarity with the child.

The brain, in other words, can learn caregiving.

Holding a baby, responding to cries, recognizing expressions, feeding, comforting, and spending time together may gradually strengthen attachment. Love is not always a dramatic feeling that arrives at birth. Sometimes it grows quietly through repeated acts of care.

Motherhood Is Also Shaped by Culture

Biology is real, but the meaning society assigns to motherhood changes across cultures and historical periods.

In some communities, child care is shared among grandparents, aunts, older siblings, neighbors, and other members of an extended family. In others, fathers take a central caregiving role. The modern American expectation that one mother should provide nearly constant emotional attention to her child is not the only model of family life.

Historian and philosopher Elisabeth Badinter examined the widespread use of wet nurses in earlier French society. Many infants, especially in wealthier families, were sent away to be cared for outside the home. She used this history to challenge the idea that maternal behavior has always appeared in one natural, universal form.

Her interpretation remains debated, but the historical evidence supports a broader point: societies create different expectations about what a “good mother” should do and feel.

The Myth of the Perfect Mother

The biological ability to care for a child should not be confused with the social image of the perfect mother.

The perfect mother supposedly understands every cry, enjoys every moment, remains patient, places her own needs last, and never feels angry, trapped, lonely, or uncertain.

No real person can consistently meet that standard.

When a woman does not experience immediate love, she may stay silent because she fears being judged. Shame can then make it harder to seek treatment for postpartum depression, anxiety, trauma, or bonding difficulties.

A healthier message would be this:

• You do not have to feel happy every moment to care for your baby.
• You do not have to understand every cry immediately.
• You do not have to become a perfect mother overnight.

Needing help does not mean that you lack love. It means that parenting was never meant to happen without support.

So, Is Maternal Instinct Real?

The most accurate answer is that motherhood includes both biology and learning.

Pregnancy changes the brain and hormonal system. These changes may increase sensitivity to a baby’s signals and support protective, nurturing behavior.

But they do not create an automatic, identical emotional experience in every woman. Attachment is also shaped by mental health, childhood experiences, social expectations, financial security, relationships, sleep, physical recovery, and opportunities for repeated caregiving.

The idealized mother who always knows what to do is largely a cultural construction.

Real mothers may feel tenderness, fear, resentment, protectiveness, exhaustion, joy, or emotional numbness—sometimes within the same day. What matters is not whether love appeared in one perfect moment, but whether care, connection, and support can continue to develop.

The capacity to love may be rooted in human biology.

But love is also something people practice.

References

• Abraham, E., Hendler, T., Shapira-Lichter, I., Kanat-Maymon, Y., Zagoory-Sharon, O., & Feldman, R. (2014). Father’s brain is sensitive to childcare experiences. Proceedings of the National Academy of Sciences, 111(27), 9792–9797.
  This study compared brain activity in mothers and fathers with different caregiving roles. It found that direct caregiving experience was associated with stronger integration of emotional and cognitive parenting networks.
• Badinter, E. (1981). Mother Love: Myth and Reality: Motherhood in Modern History. Macmillan.
  Badinter examines historical changes in motherhood, including the use of wet nurses in France, and argues that cultural conditions strongly influence maternal expectations and behavior.
• Bick, J., Dozier, M., Bernard, K., Grasso, D., & Simons, R. (2013). Foster mother-infant bonding: Associations between foster mothers’ oxytocin production, electrophysiological brain activity, feelings of commitment, and caregiving quality. Child Development, 84(3), 826–840.
  This research explores how biological responses and emotional commitment may develop in foster mothers through caregiving and interaction with an infant.
• Field, T. (2018). Postnatal anxiety prevalence, predictors and effects on development: A narrative review. Infant Behavior and Development, 51, 24–32.
  The review describes how postpartum anxiety, family conflict, limited support, and stressful birth experiences may affect bonding and mother-infant interaction.
• Hoekzema, E., Barba-Müller, E., Pozzobon, C., et al. (2017). Pregnancy leads to long-lasting changes in human brain structure. Nature Neuroscience, 20, 287–296.
  The study found pregnancy-related changes in gray matter within brain regions associated with social understanding. Some changes remained detectable two years after birth.