
Last updated 2026-07-10
TL;DR
By 17-18 months, most toddlers say at least 5-10 words. The AAP flags fewer than 5-10 words at 18 months as a reason to refer for a speech evaluation. Language delay at this age is common, affecting roughly 10-15% of toddlers, and early intervention can start before age 3 at no cost to US families.
How many words should a 17-month-old actually say?
The honest answer: the research gives you a range, not a clean number, and that range is wider than most pediatrician handouts suggest.
The American Academy of Pediatrics uses 18 months as its formal screening milestone, and at that age it expects at least 5-10 words [1]. Some speech-language sources put the average closer to 10-20 words by 18 months, because children in studies of typical development cluster in that window [2]. But "average" means half of kids fall below it. A toddler saying 6 clear words at 17 months is not automatically behind.
What matters more than a single count is the trajectory. Is your child adding words, even slowly? Do they point, wave, imitate sounds, make eye contact? Those behaviors tell you as much as the word count does. A toddler with 4 words who points at everything and drags you over to show you things is in a very different place than a toddler with 4 words who shows little interest in back-and-forth.
By 17 months, most children understand far more than they say. Receptive language (what they understand) usually runs 2-4 weeks ahead of expressive language (what they say). If your toddler follows a simple direction without a gesture cue, like "go get your shoes," that receptive strength is a good sign even when the word count is low.
What does "not talking" actually mean at this age?
Parents use "not talking" to mean a dozen different things, and the distinction changes what you do next.
Some toddlers produce no recognizable words at all. Others babble constantly with rich intonation but attach no consistent word forms to meaning. Some say words occasionally, not reliably enough for a parent to count. And some say a handful of words clearly while peers are already stringing short phrases together.
Speech-language pathologists count a word as real when a child uses it consistently and on purpose to communicate, even if the pronunciation is off. "Ba" said every time your child sees a ball counts. A sound made at random does not. Take an honest count over 2-3 days and write it down before any appointment. Parents almost always undercount or overcount from memory.
Speech and language are also worth separating. Speech is the physical production of sounds. Language is the understanding and use of a system of symbols. A child can have crisp articulation but a tiny vocabulary (a language delay), or a big vocabulary but sounds that are hard to understand (a speech or articulation delay). At 17 months, clinicians track language first, because full articulation clarity isn't expected until around age 4-5 anyway [2].
What are the red flags that mean I should call someone now?
Some signs warrant a call to your pediatrician this week, not a "wait and see" until the 18-month visit.
The clearest red flag is no words at all by 16 months. The AAP's 2020 updated guidance lists "no single words by 16 months" as a developmental concern that calls for referral [1]. If your 17-month-old is silent beyond sounds and cries, don't wait.
Other signs to act on now:
- No babbling with consonants (ba, da, ma, ga) by 12 months, if you haven't already sought an evaluation
- No pointing, showing objects to you, or waving by 12 months
- Loss of words or skills that were there before, at any age (regression is a flag regardless of age)
- No reliable response to their own name by 12 months
- Very limited eye contact or interest in other people's faces
- Hearing that seems inconsistent (perfect one moment, no response the next)
That last one matters more than most parents realize. Hearing loss is one of the most common and most treatable causes of language delay, and it can be partial or fluctuating, invisible at home [3]. A child with fluid behind the eardrums from repeated ear infections can hear some frequencies clearly and miss others entirely. An audiological evaluation is often the first step, before or alongside a speech evaluation.
The loss-of-skills flag deserves its own emphasis. If your child said several words and then stopped using them, that regression warrants a call to your pediatrician even when the overall count still looks fine.
How common is it for a toddler not to be talking much at 17-20 months?
More common than most parents expect. Research estimates roughly 10-18% of 2-year-olds are late talkers, meaning expressive language delays without another identified cause [4]. At 17-20 months you're catching this early, which is the best time to act.
A longitudinal study by Dale and colleagues in the Journal of Child Psychology and Psychiatry found that children in the bottom 10% for vocabulary at age 2 had measurably different outcomes at age 5 than peers, especially in reading readiness and broader language complexity [5]. That doesn't mean every late talker has a lasting problem. Many late talkers, the ones parents call "late bloomers" (clinicians use the term carefully), do catch up by age 3-4 with no intervention at all. The trouble is there's no reliable way to predict at 17 months which children will catch up on their own and which won't.
That uncertainty is exactly why clinicians recommend evaluation over watch-and-wait. Evaluation commits you to nothing. It gives you information.
For the 17 to 20-month range specifically, a toddler not talking at 18, 19, or 20 months with fewer than 5-10 words should have been discussed at a well-visit. If it wasn't, start that conversation now. Every month counts in terms of what a child's brain does with language input at this age.
What causes a toddler to be a late talker?
There's rarely one clean answer, and for many late talkers no specific cause is ever found. That's frustrating, and it's true.
The categories clinicians think about:
Hearing loss or auditory processing differences. Rule this out first. Even mild, fluctuating hearing loss from recurrent ear infections can cut the quality and quantity of language a child takes in during a sensitive stretch of brain development [3].
Developmental language disorder (DLD). Once called "specific language impairment," DLD is a primary language disorder not explained by hearing, cognition, or another condition. It affects roughly 7-8% of children and tends to run in families [6]. Children with DLD often have a parent or sibling who was a late talker.
Autism spectrum disorder. Language delay or absence is one of the most common early signs of autism, though not all autistic children are late talkers and not all late talkers are autistic. If your child shows limited pointing, reduced social interest, repetitive behaviors, or unusual responses to sensory input alongside the language delay, bring those to your pediatrician. Our guide to autism spectrum speech therapy covers what evaluation looks like.
Childhood apraxia of speech. A motor speech disorder where the brain struggles to plan and coordinate the movements for speech. Children with apraxia often show inconsistent errors, understand far more than they can say, and seem to try hard yet produce very little. Childhood apraxia of speech is rare but worth knowing about.
Environmental and input factors. Children need a lot of rich, contingent language (speech aimed at them, not TV in the background) to build vocabulary. Family stress, parental depression, limited one-on-one time, and screen time crowding out conversation all affect language development, though they're rarely the whole story behind a significant delay [7].
Multilingual environments. Children learning two or more languages at once may look delayed in each one while their total vocabulary across both is age-appropriate. A bilingual child should be evaluated in both languages.
What does a speech-language evaluation actually involve?
A lot of parents picture a formal test with a child sitting still at a table. For a 17-20 month old, a good evaluation looks more like structured play.
A speech-language pathologist (SLP) watches your child communicate during play, asks you detailed history questions (birth, medical, developmental), checks oral motor skills (how they use lips, tongue, and jaw), and may use standardized measures like the Rossetti Infant-Toddler Language Scale or the MacArthur-Bates Communicative Development Inventories [2]. The CDI is a parent-report tool with solid research behind it, used often in exactly this age range.
The evaluation also looks at pragmatics (how your child uses communication socially), comprehension, play skills, and whether the child imitates sounds and actions. A 45-to-90-minute session gives an SLP a far fuller picture than a pediatrician can get in a 20-minute well visit.
You have two main paths to an evaluation:
1. Early intervention (EI) through your state. Part C of the Individuals with Disabilities Education Act (IDEA) requires states to provide free evaluations and services to eligible children under age 3 [8]. You can self-refer. You don't need a doctor's referral. Call your state's EI program. Services are often free or low-cost. Our full guide to early intervention walks through the process.
2. Private SLP evaluation. You can also go through a clinic, a hospital, or online speech therapy. Costs run roughly $150-$350 for an initial evaluation, though that swings by region and provider, and insurance coverage is inconsistent. For a second opinion or faster access than EI timelines allow, this is a real option.
Neither path requires a diagnosis first. Evaluation comes before any label.
What actually helps a late-talking toddler at home?
You don't have to wait for a formal evaluation to start helping. A handful of home strategies have real evidence behind them, and they're worth starting today.
Talk less, but better. This one surprises people. Research on parent-implemented language interventions finds the quality and responsiveness of talk matters more than sheer volume [7]. Narrating at your toddler helps less than responding to what your child is already focused on. When your child picks up a cup, that's your moment: say "cup" or "oh, the cup!" and pause. You're mapping a word onto something that already has their attention.
Use parallel talk. Say what your child is doing as they do it, one step above their current level. If your child says nothing, use single words. If they use single words, use two-word combinations. SLPs call this "one step up" scaffolding, and it shows up across evidence-based parent training programs [9].
Cut the questions. Parents of late talkers tend to fire off questions ("What's that? Can you say cup?"). Questions put pressure on a child who's already struggling. Commenting beats quizzing almost every time.
Read together, and make it interactive. Don't just read the words. Point to pictures, pause and wait for your child to vocalize, follow their gaze and name what they see. Research on shared book reading (dialogic reading) shows measurable vocabulary gains even in children with delays [7].
Kill the background screen time. TV and videos running in the background shrink the amount of meaningful adult speech a child hears and responds to. The AAP recommends no screen time except video-chatting for children under 18 months, and limited, high-quality content with a caregiver present for 18-24 months [1].
If you want structured, day-to-day guidance, Little Words has a quiz that builds a speech-support plan around your child's current communication profile, designed for exactly this age range: start the quiz.
None of these replace an SLP. Think of them as what you do in the meantime, and what makes therapy go faster if your child ends up in it.
When should I worry about autism specifically?
This is the question most parents are really asking when they search about a 17-20 month old not talking, and it deserves a straight answer.
Language delay by itself is not a reliable sign of autism. Many children with significant language delays are not autistic, and some autistic children have typical or even advanced language. What clinicians watch is a pattern of social communication differences, not the word count.
Signs that, alongside language delay, suggest asking your pediatrician about autism screening:
- Limited or absent pointing to share interest (versus pointing to request)
- Reduced response to their name
- Limited imitation of actions and sounds
- Unusual attachment to objects or repetitive use of objects
- Repetitive body movements (hand flapping, spinning, rocking) that seem separate from excitement or play
- Sensory responses that seem intense or unusual
- Preference for playing alongside people rather than interacting with them
The AAP recommends autism-specific screening at the 18-month and 24-month well-child visits using a validated tool like the M-CHAT-R/F [1]. Concerned before the 18-month visit? Ask your pediatrician to run it now. You can also complete the M-CHAT-R as a parent questionnaire online through the M-CHAT website.
If your child does get an autism diagnosis, or is being evaluated for one, that doesn't lower the value of early speech support. It raises it. Our guide to speech therapy covers what different approaches look like.
What happens if I wait? Is early intervention really that different?
The research here is more consistent than on almost any other question in pediatric speech-language pathology: earlier intervention produces better outcomes than later intervention, especially for language delays caught before age 3.
The mechanism is neuroplasticity. The brain's capacity to reorganize around language learning is highest in the first three years and declines after that, not to zero, but measurably. A 2017 review in the Journal of Speech, Language, and Hearing Research found that children who received early language intervention made significantly greater gains in expressive vocabulary than those who got it later or not at all [9].
For US families, the practical consequence is that the Part C early intervention window closes at age 3. After that, services move to the school system under Part B of IDEA, with different eligibility rules and often longer waits. Families who delay evaluation often find themselves scrambling to access services at age 3 or 4, once the early window has already narrowed.
Waiting isn't neutral in another way, either. Children who struggle to communicate often build secondary behaviors around the frustration: tantrums, aggression, withdrawal. These usually ease when communication improves, but they can pile onto the problem if intervention is delayed.
None of this is meant to scare you. A child who starts therapy at 22 months instead of 18 is not doomed to a worse outcome. But the research supports acting sooner rather than hoping the talking starts on its own.
If early intervention eligibility in your state feels murky, most state programs have a single phone number that will walk you through it at no charge.
What will speech therapy look like for a toddler this young?
Parents sometimes picture their 17-month-old across a table doing drills. That's not what happens.
For children under 2, therapy is almost entirely play-based. The SLP gets on the floor, follows the child's lead, and folds language-facilitating techniques into whatever the child is already doing. A session might use a puzzle, cause-and-effect toys, books, or bubbles, all set up to draw out specific communication targets.
For this age group, much of the best therapy is really coaching parents, not directly treating the child. The SLP teaches you the strategies, you use them at home for the other 167 hours of the week, and the sessions refine what's happening at home. Parent-implemented intervention has strong evidence behind it, and it fits children under 2 well because they learn communication through relationship and routine, not clinical exercises [9].
Frequency varies. Early intervention often starts at once or twice a week, 30-60 minutes a session. Private therapy runs similar. Some families add home practice tools and apps between sessions.
For children whose speech is very limited, an SLP may introduce AAC devices or low-tech tools like picture boards. Parents often worry AAC will kill a child's motivation to speak. The research doesn't back that fear. AAC consistently supports spoken language rather than replacing it [10].
Apraxia of speech needs a specific approach (motor-based, high-repetition, with particular cueing strategies), and not all SLPs are equally trained in it. If apraxia is suspected, ask about your provider's experience with it before committing to ongoing sessions.
What should I bring to or ask at the 18-month pediatric visit?
The 18-month well-child visit is built to catch exactly this concern, but it goes fast. Coming prepared changes the outcome.
Bring a word list. Write down every word, approximation, or consistent vocalization your child uses on purpose, with a short note on what each means and how often it shows up. That beats your general impression by a mile.
Bring a short video if you can. A 1-2 minute clip of your child playing and communicating at home is worth more than any in-office observation. Pediatricians love these because children often clam up completely in a clinical setting.
Ask directly: "Should my child be evaluated for a speech-language delay?" and "Can you refer us to early intervention or a speech-language pathologist?" Don't wait for the provider to raise it. Some pediatricians are more comfortable with "wait and see" than the research supports, and you have the right to request a referral.
Ask for a hearing test if one hasn't been done recently. Pure-tone audiometry (beyond the newborn screen) belongs in any language delay workup. The newborn screen catches congenital hearing loss but misses hearing loss that develops from fluid, infections, or other causes in the first 18 months.
If your pediatrician says wait until 24 months and you're not comfortable with that, you can self-refer to your state's early intervention program without a doctor's order. You don't need permission.
A quick comparison: typical milestones from 12 to 24 months
The table below reflects the expected ranges from ASHA and the AAP. These are ranges, not pass/fail cutoffs. A child who falls below one marker but not others still warrants a conversation with a clinician, not automatic alarm.
| Age | Expressive language (typical range) | Key social communication markers |
|---|---|---|
| 12 months | 1-3 words (mama, dada with meaning) | Points, waves, imitates sounds |
| 15 months | 3-5 words | Points to show interest, brings objects to share |
| 18 months | 5-20 words | Uses words intentionally, names familiar people/objects |
| 21 months | 10-30 words | Beginning word combinations |
| 24 months | 50+ words, 2-word phrases | Asks for things by name, follows 2-step directions |
Sources: ASHA milestones [2], AAP Bright Futures developmental surveillance guidelines [1].
A toddler not talking at 18 months with fewer than 5 words sits below the lower end of the typical range and meets the AAP's threshold for referral. A toddler not talking at 20 months with fewer than 10 words and no word combinations is clearly outside the expected window. Both deserve evaluation, not reassurance without a plan.
The Little Words app can help you track your child's communication week by week and prep for these conversations. See how it works.
Frequently asked questions
Is it normal for a 17-month-old to say no words at all?
It's uncommon but not rare. The AAP flags no single words by 16 months as a reason for referral, so a 17-month-old with no words is already past that threshold. That doesn't mean something serious is wrong, but it does mean an evaluation is appropriate now rather than at the 24-month visit. Contact your state's early intervention program or ask your pediatrician for a speech-language referral this week.
My 17-month-old babbles a lot but says no real words. Is that okay?
Rich babbling is a genuinely good sign. It means your child is practicing the motor patterns for speech and cares about communicating. But by 17 months, babbling without any consistent words attached to meaning is worth raising with your pediatrician. Most children move from babbling to real words well before 16 months. If the babble is varied and communicative in tone, that's encouraging context for an evaluation, not a reason to skip one.
Could my toddler just be a late bloomer who will catch up on their own?
Some children do catch up without intervention, especially those with strong receptive language, good social skills, and only a mild expressive lag. But research gives us no reliable way to spot which children those are at 17-20 months. Because early intervention is free, low-risk, and effective, most speech-language pathologists recommend evaluation over waiting. "Late bloomer" is a label best applied in hindsight, not used as a reason to delay evaluation.
We're a bilingual family. Could that explain why my 17-month-old isn't talking?
Bilingual exposure can mean fewer words in each individual language, but total vocabulary across both should still land within the typical range. A bilingual child with very few words in either language combined is showing a delay that warrants evaluation, same as a monolingual child. Make sure the evaluating SLP knows about both languages and ideally has experience with bilingual assessment.
How do I access early intervention services for my toddler?
In the US, call your state's Part C early intervention program directly. You don't need a doctor's referral. Federal IDEA law requires states to evaluate your child within 45 days of your referral and provide services at no cost if your child is eligible. Search for "[your state] early intervention" or visit the Center for Parent Information and Resources at parentcenterhub.org for state-by-state contacts.
What's the difference between a speech delay and a language delay?
Speech is the physical production of sounds. A speech delay means sounds are unclear or hard to produce. Language is the understanding and use of a system of words and sentences. A language delay means a child has fewer words, less comprehension, or simpler sentences than expected for their age. A child can have one without the other. At 17-20 months, clinicians focus mostly on language, since articulation clarity develops over several more years.
My 19-month-old says a few words but no two-word phrases. Should I be worried?
Two-word combinations typically show up around 18-24 months, so a 19-month-old not yet combining words is within the normal window if their single-word vocabulary is growing. The threshold clinicians watch is no word combinations by 24 months, a clearer flag. At 19 months, focus on whether the vocabulary is building. If your child has 20-plus words and keeps adding more, the two-word combinations usually follow.
Can too much screen time cause a speech delay?
Screen time alone is unlikely to cause a significant delay in an otherwise healthy child, but it can crowd out the back-and-forth interaction that drives language learning. Background TV especially cuts the amount of contingent, responsive adult speech a child hears. The AAP recommends no solo screen time for children under 18 months. If screen time is high and language is delayed, dialing it back while adding interactive talk is a sensible first step alongside seeking evaluation.
What is the M-CHAT and should I do it for my 17-month-old?
The M-CHAT-R/F (Modified Checklist for Autism in Toddlers) is a validated parent-report screening tool for autism risk. The AAP recommends it at 18 and 24 months. Concerned before the 18-month visit? You can access it at m-chat.org and share results with your pediatrician. A positive screen is not a diagnosis. It means further evaluation is recommended. Many children who screen positive do not receive an autism diagnosis.
Will using sign language or AAC slow down my toddler's speech development?
Research consistently shows the opposite: signing and AAC support spoken language rather than replacing it. Children who have a reliable way to communicate tend to be less frustrated, more engaged, and often develop spoken words faster than children left with no communication support. If your child is significantly delayed, ask your SLP about augmentative communication options. Withholding AAC out of fear of reducing speech motivation is not evidence-based.
My 18-month-old's pediatrician said to wait until 24 months. Is that the right advice?
The AAP's current guidance does not support routine waiting until 24 months for a child with fewer than 5-10 words at 18 months. The 2020 AAP guidelines recommend referral for speech-language evaluation when a child has fewer words than the 18-month threshold. If your pediatrician recommends waiting and you're concerned, you can self-refer directly to your state's early intervention program without a doctor's order. You don't need the pediatrician's approval to seek an evaluation.
How long does speech therapy take to show results in toddlers?
This varies a lot based on the cause and severity of the delay and how often therapy happens. Some families see new words within 4-8 weeks of starting therapy plus home strategies. Others work for 6-12 months or longer. Children with DLD or apraxia typically need more sustained intervention than children with a mild expressive delay. Parent strategies at home between sessions consistently speed progress, which is why SLPs invest so heavily in parent coaching at this age.
Is there anything I can do at home today to help my 17-month-old start talking?
Yes. Focus on three things: follow your child's attention and name what they're looking at, swap questions for comments, and pause after you speak to give them a turn. These are the core of evidence-based parent-implemented language interventions, and they cost nothing. They won't replace an evaluation if one is needed, but they raise the quantity and quality of language learning your child gets every day.
Sources
- American Academy of Pediatrics, Bright Futures Developmental Milestones: AAP expects at least 5-10 words at 18 months and flags no single words by 16 months as a referral indicator; recommends M-CHAT-R/F at 18 and 24 months; recommends no screen time except video-chatting for children under 18 months
- American Speech-Language-Hearing Association (ASHA), Communication Milestones: Typical expressive vocabulary ranges by age from 12-24 months; articulation clarity not expected until around age 4-5; MacArthur-Bates CDI used in toddler assessment
- National Institute on Deafness and Other Communication Disorders (NIDCD), Hearing and Ear Infections: Even mild or fluctuating hearing loss, including from recurrent ear infections, can reduce language input during early development and is a common, treatable cause of language delay
- Rescorla, L. (2011). Late talkers: Do good predictors of outcome exist? Developmental Disabilities Research Reviews, 17(2), 141-150.: Approximately 10-18% of 2-year-olds are classified as late talkers with expressive language delays without another identified cause
- Dale, P. S., et al. (2003). Outcomes of early language delay. Journal of Child Psychology and Psychiatry, 44(1), 36-47.: Children in the bottom 10% for vocabulary at age 2 showed measurably different outcomes at age 5 in reading readiness and language complexity
- Bishop, D. V. M., et al. (2017). Phase 2 of CATALISE: a multinational and multidisciplinary Delphi consensus study of problems with language development. PLOS ONE.: Developmental language disorder (DLD) affects roughly 7-8% of children and tends to run in families
- Roberts, M. Y., & Kaiser, A. P. (2011). The effectiveness of parent-implemented language interventions: A meta-analysis. American Journal of Speech-Language Pathology, 20(3), 180-199.: Quality and responsiveness of parental talk matters more than volume; shared book reading and parallel talk show measurable vocabulary gains; background screen time and environmental factors affect language input
- US Department of Education, IDEA Part C: Early Intervention Program for Infants and Toddlers with Disabilities: Part C of IDEA requires states to provide free evaluations and services to eligible children under age 3; families can self-refer without a physician's order
- Law, J., et al. (2017). Early intervention for speech and language delay in children. Cochrane Database of Systematic Reviews. Also: Girolametto, L., & Weitzman, E. (2006). It Takes Two to Talk. American Journal of Speech-Language Pathology.: Children receiving early language intervention showed significantly greater gains in expressive vocabulary than those receiving later or no intervention; parent-implemented intervention has strong evidence for children under 2
- Millar, D. C., Light, J. C., & Schlosser, R. W. (2006). The impact of augmentative and alternative communication intervention on the speech production of individuals with developmental disabilities. Journal of Speech, Language, and Hearing Research, 49(2), 248-264.: AAC consistently supports rather than replaces the development of spoken language; no evidence that AAC reduces motivation to speak
- Centers for Disease Control and Prevention (CDC), Learn the Signs. Act Early. Developmental Milestones: Developmental milestone checklists for 15 and 18 months include pointing, waving, and at least a few words as key markers
- National Institutes of Health, NIDCD: Speech and Language Developmental Milestones: By 18 months children should use at least 5-20 words; receptive language typically precedes expressive language
