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When Do Babies Start Cooing?

We all cherish those sweet sounds newborns make as they look around with wide-eyed wonder. It’s as if they’re trying to communicate, even without words. Among these first sounds is baby cooing—those adorable vocalizations that often bring smiles and laughter. But beyond the cuteness, these sounds play a crucial role in your baby’s language and speech development. So, what exactly is cooing, why do babies do it, and when does it typically begin? Let’s explore what experts have to say.

What Is Cooing in Babies?

Cooing is one of the first vocalizations your baby will make beyond crying. According to Dr. Joelle McConlogue, a pediatrician at Stanford Medicine Children’s Health, these are soft vowel sounds like “ah,” “eh,” and “oh.” Dr. Denise Scott, a pediatrician from Oklahoma, adds that these noises can even sound like a gentle “coo” of a small bird.

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While cooing might seem just adorable, it marks the beginning of language development in infants. “It’s when babies start learning how to produce sounds and begin developing the muscles needed for speech,” says Dr. McConlogue. Dr. Scott also notes that these sounds originate in the neck near the vocal cords, in contrast to crying, which comes more from the chest.

When Do Babies Start Cooing?

It typically starts around 2 months of age. “By this time, we expect to see some level of vocalization,” Dr. McConlogue explains. As your baby’s language skills grow, around 4 to 6 months, they’ll begin to add consonant sounds like “ba,” “ga,” and “da.” This phase is known as the transition from cooing to babbling—where different syllables combine to form more complex sounds. This babbling stage often continues until about 9 months or even longer as your baby works toward their first words.

Why Do Babies Coo?

Is cooing a sign of happiness? Very likely! “Cooing usually indicates that a baby is content, relaxed, and happy,” notes Dr. McConlogue. Dr. Scott adds that babies might coo in response to a familiar face, soothing voice, an object, or even just for their own amusement.

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You might also notice your baby cooing while they’re asleep or during breastfeeding. Dr. Scott mentions that cooing during sleep might reflect your baby’s dreams or changes in sleep cycles, although grunting is more common. Dr. McConlogue likens cooing during feeding to the sounds we make when we enjoy a delicious meal—simply an expression of contentment.

How Does Baby Cooing Support Development?

It isn’t just a delightful sound; it’s a developmental milestone. Dr. McConlogue explains that there are two main ways in which it supports a baby’s growth:

  1. Physical Development: It helps babies exercise the muscles in their larynx, which they will later use for speech. Dr. Scott adds that it also allows them to practice using their facial muscles, crucial for forming words.
  2. Social Interaction: It is a baby’s first attempt at social engagement. “When a baby coos, they’re beginning to interact with their world,” says Dr. McConlogue. Parents and caregivers often instinctively respond by cooing and smiling back, setting the stage for early social development. This interaction helps babies learn to listen and respond, forming the foundation for future communication skills.

How to Encourage Baby Cooing and Language Development

To foster cooing and language skills, create a language-rich environment filled with varied sounds and speech. Dr. McConlogue suggests talking to your baby, even if they can’t talk back yet. Describe your actions, use expressive facial cues, read books, and sing songs. Avoid relying solely on screens or TV for language exposure. Your tone also matters; speaking gently can prompt a smile or coo, while a harsh tone might startle your baby or make them cry, according to the American Academy of Pediatrics (AAP).

When Should You Be Concerned About Baby Cooing?

If your baby isn’t cooing or making any vocal sounds by 4 months, it might be time to consult your pediatrician. By this age, your baby should also be smiling, reacting to noises, and responding to familiar faces, says Dr. Scott.

Some babies may still coo even if they have hearing issues. However, Dr. McConlogue notes that without normal hearing, there may not be a natural progression from cooing to babbling. Deaf children might initially coo but won’t typically advance in their language skills without intervention.

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For parents concerned about an autism spectrum disorder (ASD), Dr. McConlogue clarifies that language delay is just one aspect. An ooASD diagnosis usually involves other signs, like delays in social communication and repetitive behaviors. She advises patience, as sometimes all that’s needed is time to observe how a child develops.

Conclusion

Understanding when babies start cooing and why is an exciting part of parenthood. These early sounds are not just cute—they are stepping stones to your baby’s speech and social development. By recognizing and encouraging these moments, you’re helping your baby build a strong foundation for their future communication skills. Remember, if you have concerns about your baby’s vocal development, don’t hesitate to seek professional advice.

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