Developmental Delays: What They Are and What to Do
Dr. Jill Gitten Aloia, PhD, ABPP-CN
Chief Neuropsychologist at Kinspire · Board-certified clinical neuropsychologist with 25 years of experience in neurodevelopmental differences · Full bio →
· 7 min read
You noticed something. Maybe it was at your child's 18-month well visit when the pediatrician started asking questions and your answers felt off. Maybe it was watching other kids at the playground and realizing your child wasn't doing the things they were doing. Or maybe you've had a low-level worry humming in the background for months, and now it's too loud to ignore. Whatever brought you here — you were right to pay attention. Developmental delays are more common than most parents realize, and the path forward is more navigable than it might feel right now.
A developmental delay doesn't tell you where your child will end up — it tells you where to focus your energy right now.
What Is a Developmental Delay, Exactly?
A developmental delay means a child is not reaching expected milestones within the typical age range in one or more areas of development. These areas include gross motor skills (big movements like walking and jumping), fine motor skills (precise movements like gripping a crayon), speech and language, cognitive development (thinking, learning, problem-solving), and social-emotional development.
The word "delay" can feel alarming, but it's worth understanding what it actually means clinically. It does not mean your child won't get there. It means they're getting there on a different timeline — and that with the right support, that timeline can change significantly.
Developmental delays affect roughly 15–17% of children under age 18 in the United States. Some delays are isolated — a child who's a late talker but hitting every other milestone right on time. Others are global, meaning multiple areas are affected. Some have a clear cause (a genetic condition, a premature birth, a neurological difference); many don't.
What they share: the earlier you know, the more you can do.
The Difference Between a Delay and a Disorder
A developmental delay describes a pattern — the timing of reaching milestones. A developmental disorder (like autism spectrum disorder, intellectual disability, or ADHD) describes a specific neurodevelopmental condition with its own diagnostic criteria, trajectory, and implications.
A child can have a developmental delay without having a developmental disorder. And a child can be diagnosed with a developmental disorder through an evaluation that began because of a noticed delay. The delay is often the starting point — the thing that prompts a closer look. The evaluation process is what clarifies the picture.
If your child has been flagged for a developmental delay, that's not a diagnosis. It's a signal to gather more information.
What Does "Global Developmental Delay" Mean?
Global developmental delay (GDD) is a term used when a child under five shows significant delays in two or more developmental areas. It's a descriptive term used before a child is old enough for comprehensive cognitive testing. GDD is not a permanent label — many children who receive this designation go on to get more specific diagnoses (or none at all) once they're old enough for a fuller evaluation. It's an important marker for getting services started, not a ceiling on your child's potential.
How Developmental Delays Are Identified
Most developmental delays are first noticed by parents, caregivers, or pediatricians during routine well-child visits. Pediatricians use standardized developmental screening tools — like the ASQ (Ages and Stages Questionnaire) or the MCHAT-R for autism screening — to identify children who may need closer evaluation.
If a screening raises concerns, the next step is a referral for evaluation. Depending on your child's age and what areas are flagged, this might involve:
Evaluation pathways
- →Early Intervention (EI): For children under three, evaluation and services are provided through the federally-mandated Early Intervention program, which is free and comes to your home or community setting. If your child qualifies, they receive an Individualized Family Service Plan (IFSP) outlining their goals and services.
- →School-based evaluation: For children three and older, your local school district is required to evaluate for developmental concerns and provide services if eligible, under the Individuals with Disabilities Education Act (IDEA).
- →Private evaluation: Some families pursue private neuropsychological or developmental-pediatric evaluations for a more comprehensive picture, especially if they want to understand the "why" behind what they're seeing.
You don't have to wait for your pediatrician to refer you. If you have concerns, you can call your local Early Intervention program directly — no doctor's order needed for children under three.
Know Your Rights
Under IDEA, all children with suspected developmental delays have the right to a free evaluation by their local school district (age 3+) or Early Intervention program (under 3). You can request this in writing at any time.
What Causes Developmental Delays?
Parents often want to know why. Sometimes there's a clear answer — premature birth, genetic conditions, prenatal exposures, metabolic disorders, neurological differences. Environmental factors can also affect development.
But in a significant percentage of cases, no single cause is identified. What it means practically: intervention doesn't have to wait for a cause. You can act on what you're seeing right now.
What to Do When You Suspect a Delay
The most important thing you can do is act without waiting. The window of early childhood is a period of extraordinary neuroplasticity — the brain is more responsive to intervention in the first five years than at any other point in life.
Steps to take now
- →Talk to your pediatrician specifically. Ask for a developmental screening. Say directly: "I have concerns about my child's development and I'd like a referral for evaluation."
- →Contact Early Intervention if your child is under three. In most states, you can self-refer by calling your state's EI program. The evaluation is free.
- →Document what you're observing. Video clips of your child playing, eating, communicating, and moving are incredibly valuable to evaluators.
- →Get support for yourself. Finding other parents who get it — through support groups, online communities, or a therapist — matters.
How Kinspire Helps
Built for exactly this moment
Kinspire was built for exactly this moment — when you know something is going on with your child, when you're trying to navigate a system that feels overwhelming, and when you need someone in your corner who actually knows what they're talking about. Our coaches are licensed occupational therapists and other developmental specialists who translate clinical knowledge into practical strategies you can actually use.
Clinical Knowledge in Plain Language
Understand what developmental delay means for your child — and what it doesn't — without wading through jargon or waiting months for answers.
Strategies for Real Life
Get resources built for your child's specific profile and your home routines — not generic milestone checklists that don't fit your family.
Clinicians in Your Corner
Connect with licensed OTs and neuropsychologists through live sessions and coaching — so you're not navigating EI, school evaluations, and daily parenting alone.
Start for free. Grow from there.
Your Kinspire journey starts the moment you join — no waitlist, no referral needed.
- 1
Complete Our Initial Consultation
Not a questionnaire — a conversation. Dawn learns about your child's body, mind, and nervous system from the very first session.
- 2
Get Resources Built for Your Family
Receive step-by-step guidance, deep dives, and insights made specifically for your family's situation.
- 3
Access Live Sessions with Clinicians
Join live group sessions and get answers from Kinspire's OT and neuropsychology team — clinicians who can see the whole picture.
Questions Parents Are Actually Asking
Will my child "catch up"?+
That depends on many factors — the nature and degree of the delay, the areas affected, when intervention begins, and your child's individual profile. Many children who receive early, targeted intervention close the gap significantly. What we know with confidence is that early intervention improves outcomes — and that "catching up" isn't the only meaningful goal. Building functional skills, confidence, and independence matters enormously regardless of how a child compares to a norm.
Should I be worried if my pediatrician says "let's just wait and see"?+
Your instincts matter. "Wait and see" can sometimes be appropriate for very mild, isolated concerns in otherwise typically developing children — but if your gut is telling you something more is going on, advocate for an evaluation. Evaluations don't cause harm; delayed intervention can.
What's the difference between Early Intervention and private therapy?+
Early Intervention is the federally-mandated program for children under three — free, and delivered in your child's natural environment. Private therapy happens in a clinic setting and gives you more control over provider choice and scheduling, but involves cost and insurance navigation. Many families use both.