How to Spot Oral Development Delays in Children Early

Key takeaways

You cannot spot a delay without knowing the milestone. The tables below give the reference points for feeding, chewing, cup drinking and speech sounds from birth to age five. The page you are replacing had none.
Texture progression is the most useful thing to track. In a study of 7,821 children, those first given lumpy foods after nine months had more feeding problems at 15 months and were still eating a narrower range of foods at seven.²
Some classic “signs” are usually normal. Tongue thrusting is a normal infant reflex. Drooling can be normal in typically developing children up to about four.⁵ Neither is on its own evidence of a delay.
A few signs need prompt attention rather than monitoring. Coughing or choking during feeds, a wet or gurgly voice after swallowing, recurrent chest infections, or the loss of any skill the child previously had.
Speech sound milestones run later than most parents expect. Fricatives, including /s/ and /th/, are not acquired by 90% of children until close to age seven.³
You do not need a doctor’s referral. Parents are a primary referral source for early intervention, the evaluation is free regardless of income, and there is a 45-day federal deadline from referral to plan.^9,10,11
Blowing and horn exercises are not the answer. Practicing the actual skill is.¹³

6–9 mothe window in which most children move from smooth purees to lumpy textures
18%of 7,821 children in one cohort first got lumpy foods after nine months, and were still eating a narrower range at seven
45 daysthe federal deadline from an early intervention referral to a completed evaluation and a written plan

What “oral motor” actually means

Oral motor skills are the coordinated movements of the lips, tongue, jaw, cheeks and palate that let a child suck, chew, swallow and speak. They develop in a rough order, each skill building on the one before: suckling before munching, munching before rotary chewing, rotary chewing before managing mixed textures efficiently.

Three things are worth understanding before you look at the tables.

Feeding and speech share hardware, not schedules
The same structures do both jobs, but a child can chew beautifully and still say “wabbit,” or speak clearly and gag on anything lumpy. Do not assume one predicts the other.
The ranges overlap heavily
A skill listed at 9 to 12 months is not a deadline. What matters is whether a child is moving through the sequence, not whether they hit a particular month.
Losing a skill is different from acquiring one slowly
A child who could chew and now cannot is a different clinical question from a child who has not got there yet. Regression always warrants a call, at any age.

Feeding and oral motor milestones, birth to five

These are the reference points the page has never had. Ranges overlap and vary considerably — use them as reference points, not pass/fail lines.

Age	Feeding and oral motor skills	What you would typically see
0–3 months	Suck-swallow-breathe coordination; rooting; tongue extrusion reflex present	Rhythmic sucking. The tongue pushes out solids placed on it — this is normal and expected
4–6 months	Extrusion reflex fading; head and trunk control developing; first purees	Opens the mouth for a spoon; some loss of food is normal; the tongue still moves mostly front to back
6–9 months	Munching begins; tongue starts moving sideways; hands to mouth; first sips from an open or straw cup	Up-and-down jaw movement on soft solids; mouthing toys; accepts thicker textures
9–12 months	Lumpy and mashed textures; early rotary chewing; finger foods; cup drinking improving	Moves food side to side with the tongue; manages soft lumps; self-feeds pieces
12–18 months	Rotary chewing established; open cup with less spilling; uses a spoon with help	Handles most soft table foods; chews with a circular jaw motion rather than only up and down
18–24 months	Chews most family foods; straw drinking; spoon use improving	Eats a version of what the family eats; some messiness still expected
2–3 years	Efficient chewing of mixed textures; drinks without spilling; manages harder foods	Can handle raw vegetables, meat, and foods with more than one texture in a bite
3–5 years	Adult-like chewing pattern; independent utensil use; mature swallow	Eats a full range of textures; mealtimes take a normal length of time

What to do with this table. Look for sequence, not dates. A child who is three months behind but steadily progressing usually needs time. A child who has been stuck at the same texture for six months needs an assessment — that is the pattern that matters most, and it is the one the dates alone will not show you. For the underlying skills, see our guide to oral motor development for speech and feeding.

The texture window, and why it matters more than any single milestone

This is the most actionable finding on the page, and it is missing from almost every parent-facing article on the topic.

Two large studies from the same UK birth cohort looked at when children were first given lumpy solids and what happened next.

The first, covering 9,360 infants, grouped them by when lumpy solids arrived: 10.7% before six months, 71.7% between six and nine months, and 17.6% after ten months. At both six and 15 months, those introduced late were more difficult to feed and had more definite likes and dislikes, and at 15 months were significantly less likely to be eating family foods.¹

The follow-up tracked 7,821 children out to age seven. Late introduction was associated with more feeding problems at 15 months — picky eating, being difficult to feed, prolonged consumption of baby foods — and with reduced food acceptance still measurable at seven years of age.²

If your child is nearing ten months and still on purees only
Raise it. Not as an emergency, but as the single most useful thing to bring to a well-child visit. The six-to-nine-month window is when most children make the jump.
If your child gags on lumps
The instinct is to go back to smooth. That is understandable and it is also the thing most likely to entrench the problem. A feeding therapist can grade the progression so it stays tolerable, which is different from pushing through it.
How much weight to put on this
It is observational, so it does not prove the timing itself is causal — children who are hard to feed early may also be introduced to textures later. But the association holds across two large samples out to seven years, and the advice it points to carries no risk.

Speech sound milestones, and why they run later than you think

Parents often arrive at this topic worried about articulation. Here are the actual numbers, which run considerably later than most charts online suggest.

01234567 yrs

Plosives, nasals, glidesp · b · t · d · k · g · m · n · ng · w · y · h3;11
Affricatesch · j4;11
Liquidsl · r5;11
Fricativesf · v · s · z · sh · th6;11

Age by which 90% of children produce the sound accurately, from a systematic review of 15 studies covering 18,907 children acquiring English in the United States. Individual variation is substantial.³

So a five-year-old who says “wabbit” for “rabbit” or “fum” for “thumb” is inside the typical range on this data. Persistent difficulty past those ages is worth an evaluation.

A better everyday benchmark than individual sounds. Research on intelligibility growth in typical children found considerable variation, with growth continuing through age nine for children at median and lower percentiles, and concluded that children should be at least 50% intelligible by 48 months.⁴ The practical test at home is whether an unfamiliar adult can follow your child without you translating.

Our page on typical speech and language milestones from birth to seven covers the broader language picture, and delayed speech in children covers causes and options.

Signs to act on, and signs that are commonly misread

Worth acting on

Stuck on one texture for months — especially still on smooth purees approaching ten months, or refusing all mixed textures past two years
Feeding that takes very long or exhausts the child — meals routinely over 30 minutes, or a child who stops eating from fatigue rather than fullness
Poor weight gain or growth faltering alongside feeding difficulty
Losing a skill — a child who chewed and now will not, or who drank from a cup and now cannot
A very narrow diet that is shrinking rather than slowly expanding
Speech unfamiliar adults cannot follow at four and beyond⁴
Persistent open-mouth posture with chronic mouth breathing — worth investigating as an airway question. See mouth breathing and dental health and nasal breathing development

Usually normal, and commonly misread

Tongue thrusting in a baby
The tongue extrusion reflex is normal and expected in early infancy and fades around four to six months, so its presence in a young infant is not evidence of anything. In older children the direction of causation is genuinely disputed: where a gap between the front teeth already exists, the tongue moves forward to seal the mouth for swallowing, making thrust as likely a consequence as a cause. Our page on tongue posture and jaw development covers this in depth.
Drooling in toddlers and young preschoolers
Sialorrhea can be normal in children with typical development until age four.⁵ Most children who drool do so because of oral motor control or sensory awareness rather than because they produce too much saliva.⁶ Drooling that persists past four, or restarts after it had settled, is worth raising. See nighttime drooling in children.
Ordinary picky eating
Common, peaks between two and six, and driven far more by temperament and sensory sensitivity than by oral motor skill. Our page on sensory processing differences covers that profile.
Messy eating
Expected well into the third year, and not a marker of anything.
Late teeth
Not an oral motor delay. A first tooth anywhere from four to ten months is normal, and the usual threshold for investigation is no teeth by 18 months — see baby teeth and speech development.
Thumb sucking
A question about bite and jaw growth rather than a sign of oral motor delay. Covered in when thumb sucking is a problem.

Red flags that need prompt medical attention

Contact your pediatrician promptly if you see any of these

These are swallowing safety signs, not developmental timing questions.

Coughing, choking or gagging during or just after feeds, especially with liquids
A wet or gurgly-sounding voice after eating or drinking
Recurrent chest infections or pneumonia, or unexplained wheezing
Turning blue, or breathing changes during feeding
Nasal regurgitation — food or liquid coming back through the nose
Refusing to eat or drink with weight loss
Any loss of a previously established skill

Signs of swallowing difficulty are not always obvious. Aspiration can occur without visible coughing or choking, so chronic aspiration may go undiagnosed until there is significant lung injury,⁷ and recurrent respiratory infections or breathing difficulty can be the main presenting symptom.⁸ This is the one section of this page where waiting and seeing is the wrong answer.

How to actually get an evaluation

Every version of this page before now said “consult a specialist” without saying how. Here is the path.

If your child is under three

Part C of the Individuals with Disabilities Education Act guarantees early intervention for children from birth to three with disabilities or developmental delays, regardless of family income.⁹ Every state runs a program under its own name — Early Intervention Program in New York, Early Start in California, Early Childhood Intervention in Texas — but the structure is federal.

You can refer your own child
Parents are considered a primary referral source and do not have to wait for someone else to refer.¹⁰ No pediatrician sign-off, no prior diagnosis. Search for your state's name plus "early intervention" and call.
The evaluation is scheduled
It is free regardless of family income, and multidisciplinary: the team can include a speech-language pathologist, occupational therapist, physical therapist and developmental specialist, assessing communication, cognition, physical and motor, social-emotional and adaptive behavior.
A 45-day clock runs
From the date the referral is received, the system has 45 days to complete the evaluation, determine eligibility, and hold the meeting to write the plan.¹¹ Note the date you called.
The plan is written
An Individualized Family Service Plan, with goals and a review point. If your child is found ineligible, you still leave with a professional's assessment of where they are.

If your pediatrician has said “let’s wait and see” and you are not comfortable waiting, you can make the referral yourself the same day. The two run in parallel. An evaluation that finds nothing significant is a good outcome, not a wasted appointment.

If your child is three or older

Part C ends at three and Part B takes over through the school district. Request an evaluation in writing from your district’s special education office — that is what starts the timeline. Private assessment through a speech-language pathologist or occupational therapist is also an option; our cost and insurance guides cover how families navigate coverage.

Who does what

Professional	Handles
Pediatrician	First stop for red flags; rules out medical contributors; coordinates referrals
Speech-language pathologist	Feeding and swallowing, chewing skills, articulation, language
Occupational therapist	Sensory contributors to feeding, self-feeding skills, oral sensory tolerance
Pediatric dentist	Oral structures, bite, decay, tissue restrictions
ENT	Airway, tonsils and adenoids, structural assessment, swallowing safety
Registered dietitian	Where growth or nutrition is affected

You can browse providers by state through our directory.

What an evaluation actually involves

Knowing the shape of it removes most of the dread.

History
Birth and medical history, feeding history from the start, what a typical day of eating looks like, what has been tried. Bring notes — two weeks of specifics is worth more than a summary.
Observation of a meal
Often the most informative part. Bring foods your child actually eats, including one they find hard. The clinician is watching jaw movement, tongue lateralization, lip closure, the timing of the swallow, fatigue across the meal, and posture.
Oral structural exam
Tongue, palate, jaw, teeth and tissue attachments. If a tongue tie is raised, the specialist consensus defines it functionally — limited tongue mobility caused by a restrictive frenulum — and holds that a diagnosis without demonstrated mobility restriction should be reconsidered.¹² Our page on signs of a hidden oral restriction covers what that assessment should and should not conclude.
Speech and language assessment
Where indicated by the history or by what the clinician hears during the session.
Instrumental swallow study
Only where aspiration is suspected — usually a videofluoroscopic swallow study or FEES. Not routine, and not something to expect by default.
A plan
Functional goals with a review date, rather than an open-ended program. Ask when you will next sit down and look at whether it is working.

What helps, and what does not

Practice the actual skill
Motor learning is task-specific. If the goal is chewing, the practice that transfers is chewing — graded from soft-dissolvable to soft-chewy to firm.
Progress textures rather than avoiding them
The evidence on the texture window points this way.^1,2 Grading the step down is more useful than stepping back to smooth.
Get the positioning right
Feet supported, hips at about 90 degrees, table at elbow height. A child braced against gravity is spending effort they need for their mouth.
Keep mealtimes low-pressure
Pressure to eat is associated with worse outcomes, and it is the first thing most families reach for.

Skip the blowing exercises, horns, whistles and lip massage

A Cochrane review of non-speech oral motor treatment found three studies involving 22 children in total, and concluded that currently no strong evidence suggests these are an effective treatment or an effective adjunctive treatment for children with developmental speech sound disorders.¹³

Note what that review does and does not cover. Its three studies were limited to the sounds /s/ and /z/ in children with speech sound disorders of unknown origin.¹³ It says nothing about chewing. The reason to be skeptical of blowing exercises for chewing is separate and simpler: training non-speech oral tasks is not supported by principles of motor learning, which favor experience-specific training, and imaging shows different activation patterns for speech compared with non-speech oral motor tasks.¹⁴

Frequently Asked Questions

What are the signs of delayed oral motor function in children?

The most useful signal is texture progression: a child stuck on one texture for months, still on smooth purees approaching ten months, or refusing mixed textures past two years. Others include feeding that routinely exceeds 30 minutes or exhausts the child, poor weight gain alongside feeding difficulty, a shrinking rather than slowly expanding diet, speech unfamiliar adults cannot follow at four and beyond, and — most importantly — loss of a skill the child previously had.

When should my baby start eating lumpy foods?

Most children make the move between six and nine months. In a study of 9,360 infants, 71.7% were introduced to lumpy solids in that window, and children introduced after ten months were more difficult to feed and had more definite likes and dislikes at both six and 15 months. A follow-up of 7,821 children found late introduction associated with feeding problems at 15 months and reduced food acceptance still measurable at seven years. If your child is nearing ten months and still on purees only, raise it.

Is tongue thrusting a sign of a problem?

Usually not, especially in babies. The tongue extrusion reflex is normal in early infancy and fades around four to six months, so its presence in a young infant is expected. In older children the direction of causation is disputed: where an open bite or overjet already exists, the tongue moves forward to seal the mouth for swallowing, which makes thrust as likely to be a consequence as a cause.

When should drooling stop?

Sialorrhea can be normal in children with typical development until age four. Most children who drool have difficulty managing saliva rather than producing too much of it. Drooling that persists past four, or that restarts after it had settled, is worth raising with your pediatrician.

My child coughs while eating. Is that serious?

Coughing or choking during or just after feeds, especially with liquids, is a swallowing safety sign and warrants prompt medical attention rather than monitoring. Also watch for a wet or gurgly voice after swallowing, recurrent chest infections, and nasal regurgitation. Aspiration can occur without obvious coughing or choking, so it may go undiagnosed until there is significant lung injury.

At what age should my child say the /s/ and /r/ sounds clearly?

Later than most charts suggest. At the 90% criterion, all liquids including /r/ are acquired by 5 years 11 months, and all fricatives including /s/ and /th/ by 6 years 11 months. A five-year-old with an imperfect /s/ is within typical range. Difficulty past those ages is worth an evaluation, particularly if it affects how well the child is understood.

How much of my child’s speech should a stranger understand?

Children should be at least 50% intelligible by 48 months, though there is considerable variation and intelligibility continues developing through age nine for children at median and lower percentiles. The practical test is whether an unfamiliar adult can follow your child without you translating.

Do I need a doctor’s referral to get my child evaluated?

No. Under Part C of IDEA, parents are considered a primary referral source and do not have to wait for someone else to refer their child. You can call your state's early intervention program directly, the evaluation is free regardless of family income, and federal law requires evaluation, eligibility determination and the plan meeting within 45 days of referral.

Do blowing and straw exercises improve my child’s chewing or speech?

There is no good evidence for it. A Cochrane review of non-speech oral motor treatment found three studies with 22 children in total and concluded that no strong evidence suggests these are effective for developmental speech sound disorders — and those studies covered only the sounds /s/ and /z/, so the review says nothing about chewing either way. Motor learning principles favor task-specific practice, so if the goal is chewing, the useful practice is chewing.

My three-year-old still only eats purees. What should I do?

Get an evaluation rather than waiting. At three this is well outside the typical texture progression, and the evidence suggests the pattern tends to persist rather than resolve on its own. Start with your pediatrician for red flags and a hearing check, then request a school district evaluation and consider a speech-language pathologist or occupational therapist with feeding training.

Can oral motor problems affect my child’s speech?

They can share underlying causes, but they are not interchangeable and one does not reliably predict the other. Plenty of children chew well and articulate poorly, or the reverse. If speech is the concern, a speech-language pathologist assessing articulation and language directly is the right route.

What if the evaluation finds nothing?

That is a good outcome. You get a baseline, a professional's eyes on your child, and permission to stop worrying. None of that is a wasted appointment.

Sources

Northstone K, Emmett P, Nethersole F; ALSPAC Study Team. The effect of age of introduction to lumpy solids on foods eaten and reported feeding difficulties at 6 and 15 months. Journal of Human Nutrition and Dietetics. 2001;14(1):43–54. PMID 11301932. 9,360 mothers of infants born 1991/92, ALSPAC. 10.7% introduced to lumpy solids before 6 months, 71.7% between 6 and 9 months, 17.6% after 10 months. Those introduced late were more difficult to feed and had more definite likes and dislikes at both ages, and at 15 months were significantly less likely to be having family foods.
Coulthard H, Harris G, Emmett P. Delayed introduction of lumpy foods to children during the complementary feeding period affects child’s food acceptance and feeding at 7 years of age. Maternal & Child Nutrition. 2009;5(1):75–85. PMID 19161546. 7,821 mothers from the same cohort, questionnaires at 6 months, 15 months and 7 years. 12.1% before 6 months, 69.8% between 6 and 9, 18.1% after 9. Late introduction was associated with greater incidence of feeding problems at 15 months and reduced food acceptance at 7 years.
Crowe K, McLeod S. Children’s English consonant acquisition in the United States: a review. American Journal of Speech-Language Pathology. 2020;29(4):2155–2169. PMID 33181047. Fifteen studies reporting consonant acquisition of 18,907 children acquiring English in the United States. “On average, all plosives, nasals, and glides were acquired by 3;11; all affricates were acquired by 4;11; all liquids were acquired by 5;11; and all fricatives were acquired by 6;11 (90% criterion).” Variation was evident across studies.
Hustad KC, Mahr TJ, Natzke P, Rathouz PJ. Speech development between 30 and 119 months in typical children I: intelligibility growth curves for single-word and multiword productions. Journal of Speech, Language, and Hearing Research. 2021;64(10):3707–3719. PMID 34491793. Considerable variability among typical children; for those at median and lower percentiles intelligibility growth continues through 9 years. Children should be at least 50% intelligible by 48 months.
Pediatric sialorrhea (drooling). CMAJ. 2024;196(18):E624. — Sialorrhea can be normal in children with typical development until age 4 years.
NHS Greater Glasgow and Clyde. Sialorrhoea (drooling) in children. Paediatric clinical guideline 1187. — Most children who drool do so because of poor oral motor control or sensory awareness rather than because there is too much saliva.
NHS Greater Glasgow and Clyde. Sialorrhoea (drooling) in children. Paediatric clinical guideline 1187. — Aspiration often occurs without obvious coughing or choking, so chronic aspiration of saliva might not be diagnosed prior to the development of significant lung injury.
Swallowing problems: four things to know about dysphagia. Boston Children’s Hospital. — While many children with dysphagia show visible gagging, choking or coughing with feeding, others have less obvious symptoms; it is not unusual for recurrent respiratory infections, wheezing or other breathing difficulties to be the major symptom.
Individuals with Disabilities Education Act, Part C — Early Intervention Program for Infants and Toddlers with Disabilities. sites.ed.gov/idea — Services for infants and toddlers from birth to age 3 with disabilities or developmental delays, regardless of family income, assessed across communication, cognition, physical and motor, social-emotional and adaptive behavior. Checked August 29, 2026.
Center for Parent Information and Resources. Public awareness and the referral system (Part C). parentcenterhub.org/referral — Parents do not have to wait for someone else to refer their child to the early intervention system; parents themselves are considered a primary referral source. Checked August 29, 2026.
Congressional Research Service. The Individuals with Disabilities Education Act (IDEA), Part C: early intervention for infants and toddlers with disabilities. Report R43631. — The 45-day clock starts when the lead agency or early intervention services provider receives a referral; within that time the system must complete the steps to prepare the child for early intervention services.
Messner AH, Walsh J, Rosenfeld RM, et al. Clinical consensus statement: ankyloglossia in children. Otolaryngology–Head and Neck Surgery. 2020;162(5):597–611. PMID 32283998. The panel reached clear consensus describing ankyloglossia as limited tongue mobility caused by a restrictive lingual frenulum, and stated that a diagnosis without limited tongue mobility or without a restrictive frenulum should be reconsidered.
Lee AS-Y, Gibbon FE. Non-speech oral motor treatment for children with developmental speech sound disorders. Cochrane Database of Systematic Reviews. 2015;(3):CD009383. PMID 25805060. Three studies from four reports involving 22 children in total. The included studies “covered limited types of NSOMTs for treating children with speech sound disorders of unknown origin with the sounds /s/ and /z/”, and the authors judged the overall applicability of the evidence limited and incomplete: “currently no strong evidence suggests that NSOMTs are an effective treatment or an effective adjunctive treatment for children with developmental speech sound disorders.”
Maas E, Robin DA, Austermann Hula SN, et al. Principles of motor learning in treatment of motor speech disorders. American Journal of Speech-Language Pathology. 2008;17(3):277–298. PMC2685191 — Advantages of training non-speech oral motor tasks over training speech production are not supported by current principles of motor learning and neural plasticity; empirical data support experience-specific training, and functional imaging documents different activation patterns for speech compared with non-speech oral motor tasks.

Medical disclaimer. This page is for general educational purposes and does not constitute medical advice, diagnosis, or treatment. It is not a substitute for evaluation by a qualified clinician who knows your child. If your child coughs or chokes during feeds, has a wet or gurgly voice after swallowing, or has lost a skill they previously had, contact your pediatrician promptly.