Why Do Babies Cry at Birth, Not Smile? The Crucial Biological Reason Revealed

• A baby's first cry is a vital biological process for survival, not an emotional one.
• Crying helps expel fluid from the lungs and fully expand them, allowing the baby to take its first breath.
• The louder a baby cries, the healthier it is considered, indicating proper respiratory function.
• Smiling requires the development of the upper brain, which occurs gradually after birth, typically around 6-8 weeks for a first smile.
• Crying is a baby's primary language to communicate needs like hunger, discomfort, or pain.