Baby Not Babbling at 9 Months
What babbling should sound like, why it matters, and what to do if it is absent.
Key takeaways
- Babbling (consonant-vowel combinations like "bababa") should be present by 6-8 months
- The CDC lists not babbling by 9 months as a developmental red flag
- Hearing loss is the most important treatable cause of absent babbling — get a hearing test
- Babbling is different from cooing — it requires consonant sounds, not just vowels
- Absent babbling at 9 months predicts later language delay and warrants prompt evaluation
- Early intervention with speech therapy can improve outcomes significantly
Content reviewed against published CDC, AAP, ASHA guidelines
Last reviewed: July 2026 · Editorial policy
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What is normal?
Pre-speech vocalization develops in stages:
- 0-2 months: Reflexive sounds, crying
- 2-4 months: Cooing — vowel sounds (“ahh,” “ohh”)
- 4-6 months: Vocal play — squealing, growling, raspberries
- 6-8 months: Canonical babbling begins (“bababa,” “mamama,” “dadada”)
- 8-10 months: Variegated babbling (“badagama”) with speech-like intonation
- 10-12 months: Jargon (babbling that sounds like sentences) and first words
The CDC's milestone checklist includes babbling (“mama,” “baba,” “dada”) as a milestone by 9 months. Absence of canonical babbling by 9 months is a significant concern.
When to worry
Talk to your pediatrician promptly if your 9-month-old:
- Makes only vowel sounds (cooing) but no consonant sounds
- Is very quiet overall — rarely vocalizes
- Does not seem to respond to sounds or voice
- Does not turn toward sounds
- Had babbling but lost it (regression)
- Does not respond to their name
- Does not make eye contact during vocal interactions
Absent babbling at 9 months is one of the strongest early predictors of later language delay and warrants prompt hearing evaluation.
Possible causes
- Hearing loss: The most critical cause to rule out; babies must hear consonant sounds to reproduce them
- Chronic ear infections: Fluctuating hearing from fluid can delay babbling onset
- Oral-motor difficulties: Structural issues (tongue tie, cleft palate) or motor planning difficulties
- Autism spectrum disorder: Some babies with autism have reduced or absent babbling
- Prematurity: Use adjusted age — a premature baby may babble later than chronological age suggests
- Global developmental delay: Delays across multiple areas may affect vocalization
- Neurological conditions: Rarely, absent babbling may relate to neurological differences
- Limited vocal stimulation: In rare cases of severe neglect (very unlikely if you are reading this)
What you can do
- Get a hearing test: This is the essential first step — request an audiological evaluation
- Talk to your baby: Narrate daily activities, emphasizing consonant sounds
- Babble back: When your baby makes any sound, imitate it and expand on it
- Face-to-face interaction: Let your baby see your mouth moving when you talk
- Reduce background noise: TV and constant noise can mask the speech sounds babies need to hear
- Sing songs: Repetitive songs with clear consonants help babies learn sound patterns
- Take turns: Make a sound, then pause and wait — give your baby the opportunity to “respond”
- Play with sounds: Blow raspberries, make “b-b-b” sounds during play
When to get evaluated
A baby not babbling by 9 months should be evaluated. Do not wait to see if babbling develops on its own — early identification of hearing loss and other causes leads to significantly better outcomes.
- Step 1: Hearing test (audiological evaluation) — this can be done at any age
- Step 2: Speech-language evaluation — assessing pre-speech skills and communication
- Step 3: Developmental screening — to check overall development
Contact your pediatrician or your state's early intervention program directly. No referral is needed for early intervention.
Reassurance
While absent babbling at 9 months is a significant concern that needs evaluation, many causes are treatable. If hearing loss is identified and addressed early (with hearing aids or tubes for ear infections), babies often make rapid progress in vocalization.
The fact that you have noticed the absence of babbling and are seeking information is important — early identification is the first step toward early intervention, which produces the best outcomes.
Frequently asked questions
When do babies start babbling?
What does babbling sound like?
Is cooing the same as babbling?
Can hearing loss cause absent babbling?
Bottom line
Not babbling by 9 months is a CDC red flag that requires prompt evaluation. The most important first step is a hearing test — hearing loss is the most common treatable cause. Contact your pediatrician to request an audiological evaluation. If hearing is normal, a speech-language evaluation can identify other causes and start targeted intervention.
Trust your instincts. If something feels wrong, reach out to your pediatrician. Worrying about your baby means you care — that is a good thing.
All content follows our editorial policy and is reviewed against published clinical guidelines.
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