
Last updated 2026-07-09
TL;DR
Babies coo by 2 months, babble by 6 months, say a first word around 12 months, and use 50 or more words by age 2. By age 3, most kids speak in 3 to 4 word sentences. Missing two milestones in a row is a reliable reason to request a speech evaluation, not a reason to wait and see.
What are the normal speech milestones from birth to age 3?
Speech doesn't start when a baby says "mama." It starts on day one. That newborn crying already communicates hunger, pain, and discomfort, and it's laying neural groundwork for everything that follows.
Here's the honest milestone map, pulled from the American Speech-Language-Hearing Association (ASHA) and the American Academy of Pediatrics (AAP). These are typical age ranges, not deadlines. A baby who hits every milestone at the later edge is still developing normally. [1][2]
| Age | What most babies do |
|---|---|
| 0-2 months | Startles to sound; quiets to familiar voice; makes soft vowel sounds ("ooh", "ah") |
| 2-4 months | Coos and gurgles; smiles in response to faces; begins to track sound sources |
| 4-6 months | Babbles with single consonant-vowel pairs ("ba", "ma", "da"); laughs; varies pitch |
| 6-9 months | Strings syllables together ("bababa", "mamama"); turns head toward sound; shows joint attention |
| 9-12 months | Uses consistent sounds or gestures for objects; waves; may say one true word |
| 12-15 months | Says 1-5 words; points to request or comment; understands simple commands |
| 15-18 months | Has 5-20 words; vocabulary growing weekly; imitates new words |
| 18-24 months | Has 50+ words; starts combining two words ("more milk", "daddy go"); strangers understand about 50% of speech |
| 24-30 months | Uses two-word combinations regularly; asks simple questions; vocabulary may be 200-300 words |
| 30-36 months | Three to four word sentences; asks "why" and "what"; strangers understand about 75% of speech |
Two details surprise most parents. Comprehension always runs ahead of expression. A 14-month-old who can't say "cup" yet may already understand "go get your cup" with no gesture cues, and that receptive language is real language. The second surprise is the vocabulary explosion around 18 to 20 months. Before it, word learning feels slow. After it, many children add several words a day. [3]
What speech milestones matter most at 12 months?
The first birthday is the checkpoint pediatricians watch hardest. By 12 months, ASHA expects at least one true word (beyond generic "mama" and "dada"), babbling with varied consonant sounds, pointing or another gesture to share attention, and clear recognition of the child's own name. [1]
"True word" is worth defining. It's a sound the child uses consistently for the same thing, even if it doesn't match the adult word. A baby who always says "buh" for bottle is using a word. A baby who says "mama" only while crying, not while looking at mom, isn't quite there.
Joint attention is the sleeper milestone. A baby points at a dog, then looks back at you to check if you're looking too. That check-back is a big social-communication signal. Research by Mundy and colleagues found joint attention at 12 months is one of the strongest predictors of language ability at ages 2 and 3. [4] A 12-month-old who isn't pointing, reaching, waving, or sharing eye contact around objects is worth raising with your pediatrician, even if the babbling sounds fine.
The AAP's Bright Futures guidelines recommend developmental screening at 9 and 18 months, with 24 months as an added checkpoint. You don't have to wait for a scheduled visit. Any concern is a valid reason to ask. [2]
What are the speech milestones at 18 months and 2 years?
Eighteen months is where the gap between late talkers and typical talkers starts to be measurable. Most children have at least 10 words they use consistently by then. ASHA's guidance puts the typical range at 10 to 20 words at this age, and some researchers set the lower threshold at 6 to 10 meaningful words. [1][3]
Fewer than 10 words at 18 months, or a word count that has stalled instead of growing, is a late talker picture. About 13 to 17% of 18-to-30-month-olds are late talkers, according to research cited in Pediatrics. [5] Most catch up. But roughly 20 to 30% don't, and there's no reliable way to tell from watching alone which kids will get there on their own. That uncertainty is the whole argument for early evaluation.
At age 2, the two-word combination is the benchmark. "Bye-bye daddy." "Want cookie." "Big truck." Two words put together on purpose to make new meaning. A child with 80 single words who isn't combining them shows a different pattern than a child who combines but has a small vocabulary. Both deserve attention.
By 24 months, strangers should understand about 50% of what a child says. Parents usually understand more because they know their kid's pronunciations. If even you can't follow more than half of what your 2-year-old says, flag it. [1]
What are the speech milestones at age 3?
By the third birthday, the typical picture is 3 to 4 word sentences, real back-and-forth conversation, questions that start with "what," "where," and "why," and speech that strangers understand about 75% of the time. [1]
Grammar shows up in earnest around this age. Kids add "-ing" to verbs, start using plurals (with charming errors like "mouses" and "foots"), and use some prepositions. The errors are a good sign. They show the child is building grammar rules rather than memorizing phrases.
Some sounds are still coming in at 3. ASHA notes that sounds like /r/, /l/, /s/, /z/, /sh/, /ch/, and /th/ aren't expected to be mastered until age 4 to 8. [1] A 3-year-old who says "wabbit" for rabbit or "thun" for sun isn't necessarily showing a problem. A 3-year-old who's hard to understand even to familiar adults, or who mostly uses one-word utterances, has moved outside the typical range.
Stuttering-like repetitions are also common at 2 to 3, because language is developing faster than fluency can keep up. This is normal disfluency, and it usually resolves on its own. True stuttering looks different: tension, struggle, and avoidance behaviors. If you can't tell which you're seeing, an SLP can sort it out in one session.
What are the red flags for speech delay in babies and toddlers?
There's a real difference between the late edge of normal and a red flag. These are the signs that warrant referral regardless of age, pulled from AAP and ASHA guidance. [1][2]
Red flags at any age:
- Loss of previously acquired words or sounds (regression). This is the most urgent sign and always warrants prompt evaluation.
- No response to name by 12 months.
- No babbling by 12 months.
- No gestures (pointing, waving, showing) by 12 months.
- Fewer than 50 words by 24 months.
- No two-word combinations by 24 months.
- Speech mostly or entirely unintelligible to familiar adults at 36 months.
A few things parents worry about that aren't automatic red flags:
Bilingual households: kids learning two languages may mix them and may have somewhat smaller vocabularies in each single language, but their total word count across both is typically on track. Bilingualism does not cause speech delay. [6]
Birth order: parents sometimes hear that later-born children talk later because older siblings talk for them. Environment matters, but birth order alone isn't a reliable predictor of delay.
Sex differences: on average, girls produce first words slightly earlier than boys, but the difference is small and the ranges overlap almost completely. A boy at the late edge of normal isn't delayed just for being a boy.
If you're seeing a red flag and your pediatrician takes a wait-and-see approach, you can request a referral to a speech-language pathologist (SLP) directly. In the United States, children under 3 may qualify for free evaluation and therapy through early intervention under the Individuals with Disabilities Education Act (IDEA) Part C, with no physician referral required. [7] Our guide to early intervention walks through how that process works.
What's the difference between a speech delay and a language delay?
People use these terms interchangeably. They mean different things.
Speech is the physical production of sounds: articulation, fluency, voice. A child with a speech delay has trouble producing sounds or words clearly but may understand language just fine.
Language is the system of meaning: vocabulary, grammar, understanding, social use. A child with a language delay may have plenty of sounds but isn't building words or sentences on schedule, or isn't understanding what's said to them.
Many kids have both. Some have one without the other. The distinction shapes what kind of therapy actually helps.
There's a third category worth knowing. Some children have adequate vocabulary and clear speech but struggle with the back-and-forth of conversation, understanding nonliteral language, or adjusting how they talk to different people. This is sometimes called a pragmatic language disorder, and it often co-occurs with autism spectrum disorder.
If your child repeats a lot of phrases from TV or books, read our articles on echolalia and echolalia meaning. Echolalia shows up in autism and other developmental profiles, but it's also a normal phase for younger children learning language. The difference matters.
Does screen time affect baby speech milestones?
This is one of the most-Googled questions in early childhood, and the answer has some nuance to it.
AAP guidance recommends avoiding screens other than video chat for children under 18 months, and limiting high-quality educational programming to about one hour a day for children 2 to 5, always with a caregiver watching and talking along. [2]
The research supports caution about passive, background TV. A 2019 study in JAMA Pediatrics found that more background TV exposure at 12 and 24 months was associated with delayed language and reading skills at 18 and 36 months. [8] The likely mechanism is displacement: background TV cuts into the serve-and-return conversation between caregivers and babies, which is the main engine of early language.
Video chat is different. Babies as young as 17 months can learn words from live video chat with a responsive adult, while they don't learn as well from a pre-recorded video of the same person. The difference is contingency. The adult responds to the baby in real time, and that responsiveness is what builds language.
So here's the practical version. Screens aren't inherently harmful to speech. Passive screen time competes with the thing that actually builds language, which is back-and-forth interaction with a real person. Fifteen minutes of a parent talking to their baby while cooking dinner does more for speech than most educational apps.
What actually helps baby speech development at home?
The science here is clear. The biggest driver of early language is the quantity and quality of serve-and-return interaction with caregivers. That phrase comes from Harvard's Center on the Developing Child, and it describes the back-and-forth that starts at birth: baby babbles, caregiver responds, baby babbles again. [9]
Concrete things that work:
Talk to your baby constantly, even before they can respond. Narrate what you're doing. "Now we're putting on your sock. This sock is blue. There goes your foot." This is child-directed speech, and research consistently finds it supports vocabulary.
Read together, starting much earlier than feels natural. The AAP recommends reading aloud from birth. [2] Board books at 4 months aren't about comprehension. They're about shared attention, hearing language in context, and learning the rhythm of communication.
Follow your child's lead. When a baby points at something, name it. When a toddler brings you a toy, talk about it. Joint attention moments are the best teaching moments.
Drop the question load. Constant "Can you say ___?" pressure often backfires. Narrate and model instead. "Oh, you want the ball. Here's the ball. The ball is round."
Sing. Children's songs build phonological awareness, the ability to hear and manipulate the sound units of language, which is a foundation for both speech and literacy.
For families who want more structured support at home, tools like Little Words build on these principles with activities matched to your child's communication stage. The foundation never changes: responsive interaction, not passive content.
Looking for a professional? Our speech therapy guide covers how to find an SLP, what sessions look like, and what to ask.
When should I get a speech evaluation for my baby or toddler?
Sooner than you think you need to. Never wait more than two to three months after first noticing a concern.
For children under 3, the entry point is your state's early intervention program. Under IDEA Part C, children under 36 months who have a developmental delay, or a condition that puts them at risk of delay, are entitled to a free evaluation. [7] The law requires the evaluation to happen within 45 days of referral. You can self-refer, meaning you call the program yourself with no doctor's order. Find your state's program through the IDEA site or by asking your pediatrician.
For children 3 and older, evaluations run through the public school system under IDEA Part B. Your local school district must evaluate within 60 days of your written request (timelines vary by state). Private SLP evaluations are an option too, if you want faster access or a second opinion.
What happens during an evaluation? An SLP observes your child, uses standardized assessments, and takes a developmental history from you. Most evaluations run 60 to 90 minutes. You get a written report with scores, interpretation, and recommendations. "Within normal limits" is a real outcome, and a reassuring one, not a wasted appointment.
If the evaluation finds a delay, therapy may start right away. Earlier is better. Research published in Pediatrics found children who received early speech-language intervention showed significantly better language outcomes than controls, with effects still present at school age. [5]
If your child's profile points to motor speech difficulties, ask specifically about childhood apraxia of speech and apraxia of speech. These need a different therapy approach than other speech delays.
Do bilingual babies hit speech milestones differently?
Yes, but not in the way most people fear.
Bilingual children often say their first word around the same time as monolingual children. Their vocabulary in each single language may be smaller than a monolingual peer's, because they're splitting learning time across two languages. Count total vocabulary across both, though, and bilingual children are typically on par with or ahead of monolingual peers. [6]
Code-switching, mixing words from both languages in one sentence, is normal and shows sophisticated language knowledge, not confusion. A child who says "I want agua" knows something about both languages.
The biggest risk factor for language delay in bilingual homes is not enough language-rich input in either language, not the bilingualism itself. A child who hears a lot of one language at home and gets thin exposure to the other will develop the dominant language faster. That's an input issue.
If your child is being evaluated and you're raising them in two languages, make sure the SLP has experience with bilingual development. Monolingual norms applied to a bilingual child produce misleading scores. The SLP should assess in both languages or explicitly account for bilingual development in the interpretation.
Could my child's speech delay be related to autism or another condition?
Speech and language delays can happen on their own, with no other developmental differences. They're also among the earliest signs of several conditions, including autism spectrum disorder, hearing loss, childhood apraxia of speech, and intellectual disability.
This doesn't mean you should assume a diagnosis when you see a delay. It means an evaluation is the right tool. An SLP evaluates speech and language. An audiologist evaluates hearing. A developmental pediatrician or psychologist evaluates the broader picture. Different assessments, and a child may need more than one.
Hearing loss deserves emphasis because it's common and often missed. Roughly 1 to 3 per 1,000 newborns have hearing loss, and more develop it in early childhood. [10] Even mild or one-sided hearing loss can affect speech and language significantly. If your baby didn't pass their newborn hearing screen, or you have any concern about hearing, get a full audiological evaluation. In-office pediatric hearing checks aren't reliable enough to rule out hearing loss in a child with a speech delay.
On autism specifically: the AAP recommends screening all children at 18 and 24 months with a validated tool like the M-CHAT-R. [2] Speech or language delay often triggers that screening. If your child shows both speech delay and social communication differences (reduced eye contact, limited interest in other children, restricted interests, repetitive behaviors), ask for both a speech evaluation and an autism-specific evaluation. A speech delay alone does not mean autism. But the two commonly co-occur, and the full picture gets you the right support. See our article on autism spectrum speech therapy for what that looks like.
If augmentative and alternative communication (AAC) comes up in your child's plan, our guide to AAC devices lays out the options honestly.
How many words should my baby say at each age?
This is the question parents ask most, so here's the honest answer. Word counts are useful but imprecise benchmarks. They're meant to prompt action, not to be scored to the decimal.
With that caveat, here are the commonly cited targets from ASHA and the research literature. [1][3]
| Age | Expressive vocabulary target |
|---|---|
| 12 months | 1-5 words (beyond mama/dada used generically) |
| 15 months | 5-10 words |
| 18 months | 10-20 words |
| 21 months | 20-50 words |
| 24 months | 50+ words; starting two-word combinations |
| 30 months | 200-300 words; regular two-word combinations |
| 36 months | 300-500+ words; three-to-four word sentences |
These come from population averages, so there's a real range around every number. A child with 35 words at 24 months sits below the 50-word benchmark but isn't in the same situation as a child with 5 words at 24 months.
What matters as much as the count: Is the vocabulary growing over time? Is it diverse, more than the same 10 favorites? Does the child use words to communicate (requesting, commenting, greeting) rather than only imitating? Is the child combining words as well as adding new ones?
Parent-reported vocabulary counts, using tools like the MacArthur-Bates Communicative Development Inventories (CDI), are reasonably reliable and are used in research. [3] If you want to track your child's words, a running list in your phone is worth keeping.
Frequently asked questions
When do babies say their first word?
Most babies say their first recognizable word between 10 and 14 months, with 12 months being the most commonly cited milestone. First words don't have to sound like the adult version. A consistent sound your baby uses for the same object or person counts. By 15 months, most children have at least 5 words, and that number should grow steadily every few weeks.
Is my 18-month-old's speech delayed if they only have a few words?
The expected range at 18 months is 10 to 20 words, per ASHA guidelines. Fewer than 10 words at 18 months puts a child in the late talker category. That doesn't guarantee a lasting delay, but about 20 to 30% of late talkers don't catch up without support. The right move is a speech evaluation, not waiting. Early intervention for children under 3 is free under IDEA Part C in all U.S. states.
What sounds should babies be making at 6 months?
At 6 months, most babies babble with consonant-vowel combinations: "ba," "da," "ma," "ga." They vary their pitch, respond to their name, and laugh. Strings of repeated syllables like "bababa" typically appear between 6 and 9 months. If your 6-month-old is very quiet, shows no response to sounds, or isn't making any consonant sounds, mention it at your next pediatric visit.
Do girls talk earlier than boys?
On average, yes, slightly. Girls tend to produce first words a few weeks earlier than boys and may have a small vocabulary edge in the toddler years. But the difference is modest and the typical ranges overlap almost entirely. A boy at the later edge of normal isn't delayed because of his sex. Use the same benchmarks for both, and seek evaluation based on what you observe, not on gender assumptions.
Can watching too much TV cause a speech delay?
Passive screen time is linked to reduced caregiver-child interaction, which is the main driver of language development. Studies have found connections between heavy background TV exposure and slower language growth. The AAP recommends avoiding screens (except video chat) before 18 months. The mechanism is displacement: screen time replaces the back-and-forth conversation that actually builds speech. Screens aren't toxic; they crowd out interaction.
How do I know if my child has a speech delay or is just a late talker?
A late talker has expressive vocabulary below expected levels but is developing normally in other areas. A speech or language delay may involve more than word count. Red flags beyond late talking include no response to their name, loss of words they previously had, limited gestures or eye contact, and speech that isn't growing over time. A speech-language pathologist evaluation is the most reliable way to tell the difference.
Does bilingualism delay speech development?
No. Bilingual children may have smaller vocabularies in each single language compared to monolingual peers, but their total vocabulary across both languages is typically on track. Code-switching (mixing languages) is normal and not a sign of confusion. Bilingualism does not cause speech delay. If a bilingual child is delayed, the cause is something else, and the evaluation should include assessment in both languages by an SLP experienced with bilingual development.
What's the earliest age a child can get speech therapy?
There's no minimum age. Under IDEA Part C, children under 36 months can receive free early intervention, including speech therapy, if they have a developmental delay. Evaluations can happen as young as a few months old when there's a concern. In practice, most referrals happen between 12 and 24 months. Earlier is better: the research consistently shows intervention in the first three years produces stronger outcomes than the same intervention started later.
Should I worry if my 2-year-old isn't putting words together?
Yes, this is worth acting on. Two-word combinations by 24 months is one of the clearest benchmarks in early language. A 2-year-old who has words but isn't combining them shows a pattern that warrants evaluation. Contact your state's early intervention program for a free assessment. You can self-refer without a doctor's order. Don't wait for the next well-child visit if this milestone has been missed.
How is a speech delay diagnosed?
A speech-language pathologist evaluates your child using standardized assessments, observation, and a parent interview. The evaluation looks at articulation, vocabulary, sentence structure, comprehension, and social communication. Results are compared to age-based norms. Scores more than 1.5 to 2 standard deviations below the mean typically qualify a child for services. Request a hearing test too: undetected hearing loss is one of the most common and treatable causes of speech delay.
What's the difference between a speech delay and childhood apraxia of speech?
Childhood apraxia of speech is a motor speech disorder where the brain has difficulty planning and coordinating the movements needed for speech. It's not muscle weakness, and it's not the same as a general speech delay. Children with apraxia often have more inconsistent errors, more trouble with longer words, and limited progress with standard articulation therapy. It needs a specific treatment approach. If your child's speech is inconsistent and hard to understand, ask the evaluating SLP about apraxia specifically.
Is it normal for toddlers to stutter?
Repetitions, revisions, and disfluencies between ages 2 and 4 are common and usually temporary. This normal disfluency happens because language develops faster than fluency can keep up. True stuttering involves tension, struggle, facial grimacing, or avoidance of words. If your child's disfluency shows visible effort or lasts more than 6 months, see an SLP who specializes in fluency. Early treatment for true stuttering is far more effective than waiting.
When does a baby start understanding language?
Receptive language develops before expressive language at every stage. Newborns respond to their mother's voice at birth, having heard it in the womb. By 6 months, most babies respond to their own name. By 9 to 12 months, they understand simple familiar words and follow simple commands with gesture cues. By 12 to 15 months, they follow simple commands without gesture. Comprehension that's significantly behind expression is a red flag worth evaluating.
Do speech milestones predict later learning difficulties?
Language development in the first three years is one of the stronger predictors of later literacy and academic outcomes. Children with persistent language delays at age 5 are at elevated risk for reading difficulties in school. That's not a sentence, it's a reason to act early. Early intervention studies consistently show treatment in the first three years produces better long-term outcomes than waiting. Addressing a language delay early is addressing future learning risk.
Sources
- American Speech-Language-Hearing Association (ASHA), Speech and Language Developmental Milestones: Typical speech and language milestones from birth through age 5, including word count benchmarks at 12, 18, 24, and 36 months
- American Academy of Pediatrics (AAP), Bright Futures Developmental Surveillance and Screening: AAP recommends developmental screening at 9, 18, and 24 months; reading aloud from birth; and limiting screens before 18 months
- MacArthur-Bates Communicative Development Inventories (CDI), Stanford: Parent-reported vocabulary norms from large samples, including typical word counts at 12, 18, 24, and 30 months
- Mundy P et al., Journal of Child Language, Joint attention and vocabulary development: Joint attention at 12 months is a strong predictor of language outcomes at age 2 and 3
- Girolametto L et al., Pediatrics, Early intervention for late talkers: About 13-17% of 18-to-30-month-olds are late talkers; early speech-language intervention produces significantly better language outcomes with effects persisting to school age
- ASHA, Bilingual Children and Speech-Language Development: Bilingualism does not cause speech delay; total vocabulary across both languages is typically on par with monolingual peers
- U.S. Department of Education, IDEA Part C Early Intervention Program for Infants and Toddlers with Disabilities: Under IDEA Part C, children under 36 months with developmental delays are entitled to free evaluation and services; evaluation must occur within 45 days of referral; self-referral is permitted
- Duch H et al., JAMA Pediatrics, Background TV and language development: More background TV exposure at 12 and 24 months was associated with delayed language and reading skills at 18 and 36 months in a 2019 study
- Harvard Center on the Developing Child, Serve and Return Interaction: Serve-and-return back-and-forth interaction between caregivers and babies is the primary driver of early language and brain development
- Centers for Disease Control and Prevention (CDC), Hearing Loss in Children: Approximately 1 to 3 per 1,000 newborns have hearing loss, and more develop it during early childhood
