It’s a familiar sight in hospitals and even movies: when a newborn baby enters the world, the very first emotion they express is a cry, not a laugh. While this may seem instinctive, there is a scientific explanation behind this universal phenomenon.
Why Newborns Cry First
1. Activation of Lungs and Breathing
- Crying is crucial for a newborn’s lungs to expand and start functioning outside the womb.
- The first cry helps push out amniotic fluid, allowing the lungs to take in air for the first time.
2. Reflexive Response to Stimuli
- Birth is a shock to the baby’s senses: bright lights, cold air, and physical handling all act as strong stimuli.
- Crying is a natural reflex that helps the baby adapt to the new environment.
3. Communication Tool
- Crying is the baby’s first form of communication, signaling hunger, discomfort, or the need for care.
- It ensures that caregivers respond immediately, which is critical for survival.
4. Neurological Development
- Newborns’ brains are not yet developed enough to produce complex emotions like laughter.
- Crying is controlled by the primitive brain regions, which are fully functional at birth.
When Do Babies Start Laughing?
- Babies usually begin to smile socially between 6–8 weeks of age.
- Laughter develops later, as it requires cognitive recognition of humor and social interaction.
Key Takeaway
The first cry of a newborn is not just noise—it is a vital biological signal. It marks the beginning of independent life, helps activate the lungs, and serves as the baby’s first communication with the world. Laughter, though joyful, comes later when the brain and social awareness are ready.
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