Developmental Milestones: Moving Beyond Typical or Delayed Framework
- NewDayChildCoaching
- Jan 10
- 15 min read
Updated: 2 days ago
It's happened again.
Another child with significant developmental concerns getting referred less than six months before their third birthday for "language delay." But here's what the intake paperwork doesn't capture: this child also refuses any solid nutrition. The parents, already overwhelmed by managing this child's needs alongside their other children's needs, have resigned themselves to continuing supplemental liquid nutrition for the foreseeable future. They're exhausted. They're confused. And they're wondering why no one helped them sooner.
This scenario is an amalgamation of cases I've seen throughout my career—not just one child's story, but a pattern that repeats with heartbreaking regularity. The details vary: sometimes it's feeding challenges, sometimes it's motor delays alongside speech concerns, sometimes it's sensory differences that went unrecognized. But the outcome is the same: families getting referred with complex, interconnected needs that have been developing for months or years, finally getting help when early intervention is about to end.
This, unfortunately, happens more than it should. And if it's happening in my practice, my guess is that it's happening everywhere—in pediatrician offices, playgroups, and homes across the country where parents are getting the same advice: "Let's wait and see."
The problem? Our current "typical or delayed" system of identifying children with developmental needs is fundamentally broken. And it's leaving vulnerable children—and their families—without the support they desperately need during the most critical window for intervention.
The Problem With 'Typical or Delayed' Development Categories When Reviewing Developmental Milestones
Let's start with what we know: most children develop typically. Research shows that approximately 83% of children meet their developmental milestones within expected timeframes across motor, language, cognitive, and social-emotional domains (Lipkin et al., 2020, Pediatrics). That's the good news.
But here's where the system fails: for the remaining children showing developmental delays or differences, there is no clear directive on what to do next.
The current model operates on a binary system:
Typical = Everything is fine, no action needed
Delayed = Something is wrong, but you must wait until the child fails standardized evaluations or receives a pre-qualifying diagnosis to access early intervention services
This creates a devastating gap. Approximately 17% of children in the United States experience at least one developmental delay (Zablotsky et al., 2017, NCHS Data Brief). Parents notice something isn't quite right—maybe at 6 months, maybe at 12 months, maybe at 18 months—but they're told to "wait and see" until the delay becomes severe enough to qualify for services. By then, you're racing against the clock as that critical third birthday approaches and the window for early intervention begins to close.
The Hidden Cost of "Wait and See" Advice
According to national data, nearly 1 in 4 parents (23%) report worrying that their child might be delayed in their developmental milestones (C.S. Mott Children's Hospital, 2021). Yet among parents who suspected their child was behind, nearly 1 in 5 did not seek advice from a healthcare or childcare provider (C.S. Mott Children's Hospital, 2021). Why? Because many were told their concerns were premature. That their child just needed "more time."
But here's what the "wait and see" approach ignores:
The brain's window of maximum plasticity occurs in the first three years of life. During this period, toddlers have twice as many neural synapses as adults (Center on the Developing Child at Harvard University, 2023). The brain is literally wired for learning and adaptation. Interventions provided during this critical stage can fundamentally influence brain structure and function in ways that become increasingly difficult as a child ages (Dawson et al., 2010, Pediatrics).
When we tell parents to "wait and see," we're not just delaying services. We're potentially missing the most impactful period for intervention.
How the Binary System Creates Confusion and Delays Care
Here's what can happen in real practice:
A parent notices their 18-month-old isn't saying many words. They mention it at the well-child visit. The pediatrician, following standard protocol, notes that some children are late talkers and suggests monitoring for another six months. The parent, reassured but still concerned, waits.
At 24 months, the child still isn't combining words. Another well-visit. More monitoring. "Let's check again at 30 months."
At 30 months, the delay is now obvious. Referral to early intervention. Evaluation scheduled for 32 months. Services begin at 33 months. The child ages out of early intervention at 36 months.
Total intervention time received during the critical early years: 3 months.
This isn't a hypothetical scenario. This is a pattern I see in my practice—and it's a direct result of a system that only recognizes two categories: typical (do nothing) or delayed (wait until it's severe enough to qualify).
Introducing the Four-Category Framework: A Paradigm Shift in Developmental Support
What if instead of asking "Is my child typical or delayed?" we asked a different question: "What does my child need right now to support their development?"
This is the foundation of our four-category framework. It moves beyond the binary and provides actionable pathways for every child:
1. Typical + Wait: Observation With Knowledge
Who this applies to: Children meeting developmental milestones within expected ranges with no concerns in any domain.
What parents do: Continue monitoring development using evidence-based milestone checklists. Engage in age-appropriate play and activities. Celebrate progress without anxiety.
What professionals do: Provide developmental guidance at well-child visits. Educate parents on what to watch for. Create a foundation of knowledge so parents can identify when "wait" needs to shift to "go."
The key difference: This isn't passive waiting—it's informed observation with clear guidelines on when to escalate.
2. Delayed + Wait: Strategic Monitoring With Support
Who this applies to: Children showing mild delays in ONE area who ARE demonstrating progress toward the next milestone, with no other concerns identified.
Example: An 18-month-old using 15 single words (below the 20-word guideline) but adding 2-3 new words weekly, understanding instructions, using gestures to communicate, and showing strong social engagement. Research on late talkers shows that children who are adding words consistently and using gestures have strong likelihood of catching up without intervention (Paul, 1996, American Journal of Speech-Language Pathology), while those with plateaued progress benefit from immediate support.
What parents do: Implement targeted home strategies provided by professionals. Monitor specific skills weekly. Have a clear timeline for re-evaluation (typically 6-8 weeks, not 6 months).
What professionals do: Provide specific activities that target the area of delay. Schedule close follow-up. Have clear criteria for when to move to intervention.
The key difference: Parents aren't told to "just wait"—they're given tools and a specific plan with checkpoints.
3. Delayed + Go: Immediate Action Required
Who this applies to: Children with:
Significant delays in one or more areas
Minimal or no progress toward the next developmental milestone
Delays impacting daily functioning or family quality of life
Parent concern that persists despite reassurance
Example: That child I mentioned at the beginning—approaching age 3, limited verbal communication, refusing solid foods, with overwhelmed parents who've been "waiting" for improvement that hasn't materialized.
What parents do: Seek evaluation immediately. Access early intervention and/or outpatient therapy services. Implement multidisciplinary support as needed.
What professionals do: Refer without delay. Provide family-centered intervention that addresses multiple domains. Coordinate across disciplines when a child's needs span physical, feeding, sensory, and communication development.
The key difference: We don't wait for the child to "fail" enough to qualify. The presence of delay + lack of progress = go.
4. Different + Go: Supporting Neurodivergence and Individual Development Paths
Who this applies to: Children whose development follows a different trajectory—they're not simply "behind," they're developing in a qualitatively different way. This includes:
Children showing early signs of autism spectrum differences
Children with sensory processing differences affecting participation
Children with motor planning challenges that don't fit "delay" patterns
Children whose development is uneven across domains
Example: A 2-year-old with age-appropriate or advanced cognitive skills but minimal social engagement, preference for sameness, intense sensory sensitivities, and communication that's echolalic rather than conversational.
What parents do: Seek comprehensive evaluation. Access specialized support that understands neurodevelopmental differences rather than trying to "fix" delays. Connect with professionals who view differences through a supportive lens, not a deficit model. The AAP recommends autism-specific screening at 18 and 24 months (Hyman et al., 2020, Pediatrics), but families experiencing concerns about social communication, repetitive behaviors, or sensory differences can seek evaluation at any age.
What professionals do: Provide affirming, family-centered support. Offer strategies that work WITH the child's neurology, not against it. Recognize that "different" doesn't mean "wait until it becomes delayed enough to qualify for services."
The key difference: We support differences proactively rather than waiting for them to create functional impairment severe enough to meet service thresholds.
Why Many Care Providers Miss the Full Picture
Here's an uncomfortable truth: many healthcare providers on a child's team do not have the comprehensive expertise to understand how physical, sensory, social, and communication skills develop—or how these domains interact and influence each other.
A pediatrician, in a 15-minute well-child visit, may notice speech delay but miss:
The sensory defensiveness preventing the child from exploring age-appropriate foods and textures
The motor planning challenges making imitation difficult, which impacts both speech development and social learning
The social communication differences that explain why the child isn't using gestures or engaging in back-and-forth interaction
The underlying regulation challenges that manifest as "pickiness" or "difficult behavior"
This isn't a criticism—it's reality. Despite 89% of parents lacking adequate knowledge of typical developmental trajectories (Bridging the Gap Study, 2023, Frontiers in Pediatrics), pediatricians receive minimal training in the nuanced intersection of pediatric physical therapy, occupational therapy, and speech-language pathology. Developmental screening occurs at only 9, 18, and 30-month visits per AAP guidelines (Lipkin et al., 2020), leaving significant gaps where concerns can emerge unaddressed.
This is where a multidisciplinary team becomes essential.
When you have a physical therapist, occupational therapist, and speech-language pathologist evaluating a child together, you get a complete picture:
The PT sees how core strength and motor coordination impact the child's ability to sit at a table for meals and engage in play that builds social skills
The OT identifies sensory processing patterns that explain food refusal, explores how fine motor delays impact self-feeding, and recognizes when regulation challenges are mistaken for behavior problems
The SLP assesses not just how many words a child says, but how they're using communication—gestures, eye contact, joint attention, play skills—all of which predict language development better than word count alone
When these professionals collaborate, patterns emerge that a single discipline might miss. That "speech delay" is actually part of a broader sensory-motor-communication profile that needs integrated support. Studies show that parents demonstrate highest knowledge in motor development milestones but significantly lower accuracy in language and social-emotional domains (Chung et al., 2023, Frontiers in Pediatrics), making multidisciplinary evaluation essential for identifying the full scope of a child's needs.
Moving From "Wait and See" to "Watch and Support"
The four-category framework fundamentally changes the conversation from:
"Is my child typical or delayed?" to
"What does my child need right now, and who can provide it?"
It acknowledges that:
Not all delay requires immediate intervention (Delayed + Wait with strategic support)
But all delay requires informed action (not passive waiting)
Difference needs support, not severity (Different + Go, even when skills are emerging)
Families deserve guidance, not anxiety (clear pathways, not "let's wait 6 months and see")
How to Know Which Category Applies to Your Child
Start by asking these questions:
1. Is my child showing progress toward the next milestone?
Yes, steady progress → Consider Delayed + Wait with monitoring
No progress or regression → Delayed + Go
2. Does my child's development follow a similar pattern to peers, just slower?
Yes, similar pattern → Delayed categories
No, qualitatively different → Different + Go
3. Is the delay impacting daily life or family functioning?
Yes, significant impact → Delayed + Go (regardless of "severity")
Minimal impact but persistent parent concern → Seek evaluation
4. Are there concerns in multiple developmental areas?
Multiple areas affected → Delayed + Go or Different + Go (comprehensive evaluation needed)
Single area with progress → Delayed + Wait with professional guidance
5. Has my child been "waiting" for improvement for more than 8 weeks, with guided parent support, without change?
Yes → Time to move to "Go"
No, recent concern → Start with informed monitoring
What This Framework Means for Your Child's Development
Imagine a different scenario:
A parent notices their 18-month-old isn't saying many words. They bring it up at the well-child visit. Instead of "wait and see," the pediatrician asks:
"How many words is she using consistently?"
"Is she adding new words each week or has it plateaued?"
"How does she communicate what she wants—gestures, leading you places, sounds?"
"Does she engage in back-and-forth interaction with you?"
Based on the answers, the pediatrician determines: Delayed + Wait with strategic support.
The parent receives:
Specific language-building activities to use at home
A milestone tracker focusing on communication development
A scheduled 6-week follow-up (not 6 months)
Clear criteria: "If she's not adding 1-2 words weekly by our next visit, we'll refer for evaluation"
At the 6-week check, one of three things happens:
Progress noted → Continue monitoring, extend next check to 8-10 weeks
No progress → Immediate referral to speech-language pathologist
Regression or new concerns → Comprehensive multidisciplinary evaluation
Total time from concern to action if needed: 6 weeks, not many months.
This is the power of moving beyond "typical or delayed" to a framework that provides clear pathways and immediate support.
Questions to Ask Your Pediatrician About Developmental Concerns
If you have concerns about your child's development, here are specific questions that can help you advocate for the right support:
Instead of: "Is my child delayed?"Ask: "Can you help me understand what skills my child should be developing toward next, and what I should watch for?"
Instead of: "Should we wait and see?"Ask: "What specific things should I monitor, how often, and what would tell us we need to move to evaluation rather than monitoring?"
Instead of: "Is this normal?"Ask: "Given what we're seeing, what category best fits: typical development, delayed but progressing, delayed without progress, or different development pattern? And what's the recommended action for that category?"
Instead of accepting: "Every child develops at their own pace." Respond: "I understand there's a range, but I need help understanding if my child is within that range or if we need to take action now. Can you help me figure out which?"
Early Intervention: Why Timing Matters for Child Development
The research is unequivocal: early intervention works. Studies consistently demonstrate that interventions provided before age 3 produce significantly better outcomes than the same interventions provided later (Center on the Developing Child at Harvard University, 2023; National Early Childhood Technical Assistance Center, 2011).
Here's why:
Brain plasticity peaks early. The neural pathways that support language, motor coordination, social engagement, and learning are most adaptable in the first three years (Tau & Peterson, 2010, Neuropsychology Review). Intervention during this window can literally reshape how the brain develops.
Skills build on skills. When a child misses early milestones, it affects what comes next. A child who doesn't develop strong core stability will struggle with fine motor skills needed for self-feeding and later writing. A child who doesn't develop joint attention and gesture use will struggle with language development (Rescorla & Turner, 2015, Journal of Speech, Language, and Hearing Research). Delays compound when left unaddressed.
Family stress increases over time. Parents who "wait and see" for months or years experience mounting anxiety, guilt, and overwhelm. Research shows that family stress is significantly reduced when children receive timely intervention and parents feel supported in understanding their child's needs (Bailey et al., 2004, Journal of Early Intervention). The longer families go without support, the more strained the entire family system becomes.
Access gets harder, not easier. Waitlists for developmental evaluations can be 6-12 months long. Early intervention services end at age 3. The math is devastating: if you wait until age 2.5 to seek help, you might only access 3 months of early intervention before aging out to school-based services that offer less intensive support. Additionally, only 19% of parents report their child received both developmental monitoring and screening in healthcare settings (Hirai et al., 2018, National Survey of Children's Health), meaning most children slip through the cracks entirely.
What Parents Can Do Right Now
If you're reading this and thinking about your child, here's what you can do:
1. Trust your instincts. Parents are typically the first to notice developmental concerns, and research shows parent concern is a strong predictor of actual delay (Glascoe, 2003, Pediatrics in Review; average age of initial parental concern is 14 months). If something feels off, pursue it.
2. Track development actively. Download milestone checklists (CDC offers free apps) and note what your child CAN do, not just what they can't. This gives you concrete data for conversations with providers.
3. Demand specific action plans. If a provider suggests "wait and see," ask for the monitoring plan: What exactly should you watch? How often? What criteria would move from waiting to evaluation?
4. Seek evaluation when indicated. If your child fits "Delayed + Go" or "Different + Go" categories, don't wait for permission. Contact early intervention (ages 0-3) or outpatient pediatric therapy directly. You don't always need a physician referral.
5. Find multidisciplinary support. For children with needs spanning multiple domains, seek professionals who work collaboratively. A speech therapist working in isolation from an occupational therapist won't see the full picture of a child with feeding challenges, sensory differences, and communication delays.
6. Connect with other parents. You're not alone. Join communities where families share real experiences navigating developmental concerns, accessing services, and supporting their children's growth.
The Bottom Line: Children Deserve More Than "Typical or Delayed"
The children I mentioned at the beginning—referred at 2.5 years old with multiple unaddressed needs? These aren't isolated cases. They represent a pattern I've witnessed across too many families in my practice. Each family's specific challenges differ, but the systemic failure is identical: referrals that should have happened at 18 months. Or 12 months. Or 6 months. Or whenever the first concern arose that persisted beyond a few weeks.
But our current system made these families wait. Wait for the delay to become severe enough. Wait to "fail" evaluations. Wait while stress compounded and that critical intervention window narrowed.
We can do better.
By replacing the binary "typical or delayed" model with a framework that provides clear pathways—Typical + Wait, Delayed + Wait, Delayed + Go, Different + Go—we can:
Give families immediate, actionable guidance instead of vague reassurance
Provide strategic support during monitoring phases, not passive waiting
Intervene early for children who need it, not after they've fallen far enough behind to qualify
Support neurodivergent children before differences become "severe enough" to access services
Reduce family stress by replacing uncertainty with clear next steps
This isn't just a different way of categorizing development. It's a fundamental shift in how we support families.
Because every child deserves more than "wait and see." They deserve "watch and support." And every family deserves clarity, not confusion, when they're worried about their child's development.
About the Author
Rachel Lynn May, MA, CCC-SLP, is a speech-language pathologist and founder of New Day Child Coaching, a virtual parent coaching service for families with infants and toddlers nationwide. Together with Dr. Amber (licensed physical therapist) and Amanda (licensed occupational therapist), their multidisciplinary team brings 39+ years of combined pediatric expertise to families navigating developmental concerns.
Ready to move beyond "typical or delayed" for your child?
Join our community of 16,000+ parents who are getting evidence-based developmental guidance—not just "wait and see" advice.
Concerned about your child's development?
Our multidisciplinary team offers individual coaching consultations to help you understand exactly what your child needs. Schedule a coaching session with Dr. Amber (PT), Amanda (OT), or Rachel (SLP).
References
Primary Research Citations:
Center on the Developing Child at Harvard University. (2023). InBrief: The Science of Early Childhood Development. Retrieved from https://developingchild.harvard.edu/
Centers for Disease Control and Prevention. (2025). "Learn the Signs. Act Early." Developmental Milestones. Retrieved from https://www.cdc.gov/ncbddd/actearly/milestones/index.html
Dawson, G., Rogers, S., Munson, J., Smith, M., Winter, J., Greenson, J., ... & Varley, J. (2010). Randomized, controlled trial of an intervention for toddlers with autism: the Early Start Denver Model. Pediatrics, 125(1), e17-e23.
Glascoe, F. P. (2003). Parents' evaluation of developmental status: how well do parents' concerns identify children with behavioral and emotional problems? Clinical Pediatrics, 42(2), 133-138.
Hirai, A. H., Kogan, M. D., Kandasamy, V., Reuland, C., & Bethell, C. (2018). Prevalence and variation of developmental screening and surveillance in early childhood. JAMA Pediatrics, 172(9), 857-866.
Hyman, S. L., Levy, S. E., Myers, S. M., & Council on Children with Disabilities, Section on Developmental and Behavioral Pediatrics. (2020). Identification, evaluation, and management of children with autism spectrum disorder. Pediatrics, 145(1), e20193447.
Lipkin, P. H., Macias, M. M., Council on Children with Disabilities, Section on Developmental and Behavioral Pediatrics. (2020). Promoting optimal development: identifying infants and young children with developmental disorders through developmental surveillance and screening. Pediatrics, 145(1), e20193449.
C.S. Mott Children's Hospital. (2021). National Poll on Children's Health: Milestones - How parents understand child development. University of Michigan. Retrieved from https://mottpoll.org/reports/milestones-how-parents-understand-child-development
National Early Childhood Technical Assistance Center. (2011). The Importance of Early Intervention for Infants and Toddlers with Disabilities and Their Families. U.S. Department of Education.
Paul, R. (1996). Clinical implications of the natural history of slow expressive language development. American Journal of Speech-Language Pathology, 5(2), 5-20.
Rescorla, L., & Turner, H. L. (2015). Morphology and syntax in late talkers at age 5. Journal of Speech, Language, and Hearing Research, 58(2), 434-444.
Tau, G. Z., & Peterson, B. S. (2010). Normal development of brain circuits. Neuropsychopharmacology, 35(1), 147-168.
Zablotsky, B., Black, L. I., & Blumberg, S. J. (2017). Estimated prevalence of children with diagnosed developmental disabilities in the United States, 2014–2016. NCHS Data Brief, (291), 1-8.
Additional Supporting Research:
Al-Qabandi, M., Gorter, J. W., & Rosenbaum, P. (2011). Early autism detection: are we ready for routine screening? Pediatrics, 128(1), e211-e217.
American Academy of Pediatrics. (2020). Developmental surveillance and screening. In Bright Futures: Guidelines for Health Supervision of Infants, Children, and Adolescents (4th ed.). AAP.
Barger, B., Rice, C., Wolf, R., & Roach, A. (2018). Better together: Developmental screening and monitoring best identify children who need early intervention. Disability and Health Journal, 11(3), 420-426.
Bailey, D. B., Bruder, M. B., Hebbeler, K., Carta, J., Defosset, M., Greenwood, C., ... & Barton, L. (2004). Recommended outcomes for families of young children with disabilities. Journal of Early Intervention, 26(4), 227-251.
Chung, E. Y. H., Cai, J. J., & Crabtree, B. F. (2023). Bridging the gap: Parents' knowledge of childhood developmental milestones and the early identification of children with developmental delay. Frontiers in Pediatrics, 10, 1017678.
A Note on Content Creation
The ideas, insights, frameworks, and expertise shared in this post are entirely my own — rooted in years of real experience working with families and the work we do every day at NewDay Child Coaching. AI tools assisted with formatting, structure, and SEO optimization to help this content reach the families who need it most. The heart of it? The concepts, knowledge, and original thought are the sole intellectual property of Rachel May and NewDay Child Coaching.
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