Child Losing Speech or Language Regression
The short answer
Losing words or language skills that your child previously had - known as language regression - is always worth taking seriously. While some temporary "quiet periods" can occur when a toddler is focused on a new skill like walking, true loss of words (especially multiple words over weeks) should be evaluated promptly. About 25-30% of children later diagnosed with autism experience some form of language regression.
By Age
What to expect by age
Some parents notice that a baby who was saying "mama" or "dada" seems to stop for a while. A brief pause in word use around the time a baby starts walking is not uncommon - their brain is busy mastering a huge motor skill. However, loss of multiple words, especially combined with decreasing social engagement (less eye contact, less interest in people), is different and warrants evaluation.
This is the age window where language regression is most commonly noticed by parents. If your toddler had 10-20 words and now uses only a few, or if they've stopped attempting to communicate altogether, don't wait - request an evaluation. The earlier regression is identified, the earlier supportive therapies can begin. A comprehensive evaluation will typically include hearing testing, developmental assessment, and often autism screening.
Language regression at this age - losing phrases or sentences previously used, or shifting from spontaneous speech to only echolalia - should always be evaluated. At this age, regression can sometimes be associated with a rare condition called Landau-Kleffner syndrome (acquired epileptic aphasia), which is treatable. An EEG may be recommended alongside developmental evaluation.
Language regression in a child over 3 who was previously speaking in sentences is uncommon and should be evaluated urgently. Causes can include neurological conditions, hearing loss (which can develop at any age), severe emotional stress, or selective mutism. Your pediatrician will likely refer for a comprehensive workup.
What Should You Do?
When to take action
- Your baby briefly stopped saying a word or two during a period of intense motor development (like learning to walk) but the words came back within a week or two.
- Your toddler uses different words on different days - rotating through their vocabulary is normal and doesn't count as regression.
- Your toddler stops using a word because they've replaced it with a better version (stopped saying "ba" for ball because they now say "ball").
- Your child has clearly lost words they were using consistently - they used to say 5+ words and now use fewer.
- Your child's communication attempts have decreased - they used to point and babble and now do less of both.
- Your child seems less interested in social interaction than they used to be - less eye contact, less sharing of enjoyment.
- Other family members or caregivers have independently noticed that your child seems to be talking less.
- Your child has lost multiple words or phrases over a period of weeks and shows decreased social engagement - request a comprehensive developmental evaluation promptly.
- Your child's language regression is accompanied by new unusual behaviors - repetitive movements, extreme reactions to sensory input, or loss of other skills like self-feeding.
- Your child experiences sudden language loss after a period of illness, seizure, or head injury - seek medical evaluation immediately.
Sources
Related Resources
Related Speech Concerns
My Baby Is Losing Words or Skills
If your child was consistently using words and has truly stopped, this is something to act on promptly. Regression - the genuine loss of skills a child previously had - is different from a normal plateau or a toddler being too busy to talk, and it always warrants a conversation with your pediatrician sooner rather than later.
Baby Not Babbling
Babbling with consonant sounds like "ba," "da," and "ma" typically begins between 6 and 9 months and is an important building block for speech. Babies develop at different rates, but if your baby is not making any consonant sounds by 9 months, a hearing check is a good first step.
Baby Not Laughing at Peek-a-Boo
Most babies start showing delight during peek-a-boo between 6 and 9 months, when they develop "object permanence" - the understanding that things still exist when hidden. If your baby isn't laughing at peek-a-boo yet, consider their age and overall social engagement. Some babies prefer other games, and some show enjoyment through smiles or excited movements rather than laughter. What matters most is whether your baby is socially engaged with you overall.
Baby Not Making Vowel Sounds
Most babies begin making vowel sounds - those lovely "oooh," "aaah," and "eee" sounds - around 2 to 3 months of age. This early cooing is one of the first steps in language development. Some babies are naturally quieter than others, but if your baby isn't making any vowel sounds by 4 months, it's worth checking in with your pediatrician to make sure hearing and development are on track.
Baby Not Responding to Own Name Consistently
Most babies start recognizing and responding to their own name between 5 and 7 months, though consistent response may take until 9 months. It's common for babies to sometimes ignore their name when they're focused on something interesting - this is normal. However, if your baby rarely or never turns when you say their name by 9 months, it's worth discussing with your pediatrician to check hearing and development.
Baby Not Turning to Sounds
Babies typically begin turning toward sounds around 4 to 6 months of age. If your baby isn't consistently looking toward voices or noises by 6 months, it's worth having their hearing checked. In many cases, something as simple as fluid in the ears can temporarily affect hearing, and early identification leads to the best outcomes.