What Happens to a Baby During the Third Growth Crisis
 Category | Growth crises |
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⏱️ Reading time: 2 minutes
Medically reviewed by pediatrician and perinatal psychologist Polina Kizino
The third growth leap brings new impressions and the first “conversations”. Your baby starts noticing changes in light, sound, and movement, begins gazing at faces, tracking toys, and trying to babble. They may want to be held more often, seem fussier, and sleep less — it’s their way of adjusting to change. This leap usually happens around weeks 11–12, but every baby has their own pace.
What’s Inside
Quick takeaways
The third growth crisis typically occurs around week 11–12.
The brain begins to respond to changes: light, sound, and movement become more distinct.
The first intentional eye contact appears — the baby starts “looking into” faces.
The baby may become more anxious and seek more rocking and closeness.
Babbling begins, along with responses to voices and attempts to “join the conversation”.
Transitions and changes — a new level of perception
Previously, the baby only noticed strong stimuli (bright light, loud noise), but now they begin to perceive gradual changes: how light brightens, how voices become softer or louder, how a toy slowly moves. This signals the maturation of the visual and auditory cortex.
The baby starts holding their gaze — following faces or toys for longer, tracking movement. This is the foundation for developing attention and control.
First steps toward emotional connection
The baby doesn’t just react to the parent's face — they begin to recognize it. Smiles become intentional, gazes focused. This is the beginning of emotional bonding and social awareness.
At the same time, babbling develops: the baby “responds” to speech, tries to imitate sounds, and pauses when hearing their name.
Behavior may change suddenly
Like every growth crisis, development brings nervous system tension. This might look like:
- frequent night wakings
- fussiness or unexplained crying
- wanting to be held constantly
- difficulty calming down
This is normal: it's part of adaptation and will pass
How to support your baby
- Speak calmly, clearly, and with pauses.
- Hold your baby facing you so they can watch your expressions.
- Support contact through swaddling, rhythmic motion, and rocking.
- Avoid sudden changes in routine — consistency helps with adjustment.
With care
Our articles are based on evidence-based medicine and reviewed by pediatricians. However, they do not replace a consultation with your doctor. Every child is unique — if you have any concerns, please consult a medical professional.
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Sources
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- Child growth standards, WHO, https://www.who.int/tools/child-growth-standards/standards. Accessed 7 May 2025.
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