The 18-month check-up is one of the most important visits in your child’s early years. It can also leave you with a lot of questions, especially if something about your little one’s development has been quietly tugging at your heart.

In this post, I’ll walk you through what your doctor looks for at this visit, the red flags you might notice at home, and what to do if something feels off.

TLDR: Jump To:

What Your Doctor Is Looking For
Red Flags You Might Notice at Home
Questions To Ask Your Doctor

Why the 18-Month Check-Up Matters

Toddlers pick up new skills fast at this age: first words, pointing, walking, and simple play. That makes 18 months a natural checkpoint for spotting delays early.

At this visit, many doctors:

• Do a full physical exam and check growth
• Ask about speech, social skills, movement, and play
• Give you a short questionnaire about your child’s development
• Screen for developmental delays and early signs of autism

If you’re noticing any red flags at home, you can ask your doctor for a developmental screening, even if they don’t typically complete one.

Early support makes a real difference. If something needs a closer look, this visit is often the first step toward getting your child the help they need.

What Your Doctor Is Looking For

Your doctor compares your child’s skills to milestones most children reach by 18 months. Here’s what they’re watching for in each area.

Speech and Language

• Tries to say three or more words besides “mama” or “dada”
• Follows simple one-step directions without you pointing or gesturing, like handing you a toy when you say “Give it to me”

Social and Emotional

• Points to show you something interesting
• Wanders away from you, but checks back to make sure you’re close
• Looks at a few pages of a book with you
• Holds out their hands for washing
• Helps with dressing by pushing an arm through a sleeve or lifting a foot

Play and Thinking

• Copies you doing chores, like sweeping with a broom
• Plays with toys in simple ways, like pushing a toy car

Movement

• Walks without holding on to anyone or anything
• Climbs on and off a couch or chair without help
• Scribbles
• Drinks from an open cup, with a few spills
• Feeds themselves with their fingers and tries to use a spoon

The Screening Questionnaire

Many doctors ask you to fill out a short questionnaire at this visit. Two common ones:

• Ages and Stages Questionnaire (ASQ): looks at overall development, including communication, movement, problem-solving, and social skills
• Modified Checklist for Autism in Toddlers, Revised with Follow-Up (M-CHAT-R/F): a set of yes-or-no questions about early signs of autism, like pointing, eye contact, and responding to their name

A concerning result doesn’t mean your child has a diagnosis. It simply means your doctor wants to take a closer look.

If your child arrived more than three weeks early, your doctor will likely use their corrected age (their age based on their due date) when checking milestones.

Red Flags You Might Notice at Home

You see your child every day, in every mood and setting. That makes you the best person to notice when something seems off.

I highly suggest talking with your doctor if your 18-month-old is experiencing one, some, or most of these:

• Isn’t walking on their own
• Doesn’t point to show you things
• Isn’t saying at least three words besides “mama” or “dada”
• Isn’t picking up new words
• Doesn’t follow simple directions
• Doesn’t copy what you do
• Doesn’t seem to know what everyday things are for, like a spoon, brush, or phone
• Doesn’t notice or seem to mind when you leave or come back
• Rarely responds to their name
• Rarely makes eye contact
• Doesn’t react to sounds or voices
• Walks on their toes most of the time
• Repeats movements often, like hand-flapping, rocking, or spinning
• Has very strong reactions to sounds, textures, or lights
• Loses skills they once had, like words, waving, or pointing

One red flag on its own doesn’t mean something is wrong. But losing skills is always worth a call to your doctor right away, at any age.

What to Do If Something Feels Off

1. Write it down. Jot down what you’re noticing and when. Short videos on your phone help a lot, since toddlers don’t always show their usual behaviour in a doctor’s office.
2. Speak up early. You don’t have to wait for the next check-up. Book an appointment and share your concerns.
3. Ask for a screening. If your doctor doesn’t offer a developmental or autism screening, you can ask for one.
4. Ask about a hearing test. Hearing problems can affect speech and social skills, so ruling them out is a helpful early step.
5. Ask about next steps. Depending on what you’re seeing, your doctor may refer you to a pediatrician, speech-language pathologist, or developmental specialist. Many areas also have early intervention programs that let parents reach out directly.

If you’re not sure how to talk to your doctor about red flags you’re seeing at home, or if you’ve been told to ‘wait and see’ but feel your child needs immediate support, this product will help:

✓ Never forget an important question
✓ Confidently advocate for your child
✓ Organize symptoms, medications, and observations
✓ Take clearer notes during appointments
✓ Leave with a plan for what’s next

WALK INTO EVERY DOCTOR’S APPOINTMENT WITH CONFIDENCE.

Doctor’s appointments move quickly. It’s easy to forget important questions, leave with more confusion than answers, or remember everything you wanted to ask as you’re on your way home.

Get The Doctor’s Visit Playbook

Questions to Bring to the Appointment

• Is my child on track in each area of development?
• Can we do a developmental screening today?
• Should we check my child’s hearing?
• What should I watch for before the next visit?
• If we need a referral, who do we see next, and how long is the wait?
• What can I do at home to support my child while we wait?

Trust What You’re Seeing

You know your child best. If something feels off, speaking up is never an overreaction. It’s one of the most loving things you can do.

And if your doctor does find a delay, there’s so much hope. Early intervention support helps children build skills, and you don’t have to figure out the next steps alone.

Sources

1. Centers for Disease Control and Prevention (CDC). “Milestones by 18 Months.” Learn the Signs. Act Early. https://www.cdc.gov/act-early/milestones/18-months.html
2. Centers for Disease Control and Prevention (CDC). “Milestones in Action: By 18 Months.” https://www.cdc.gov/act-early/milestones-in-action/18-months.html
3. Centers for Disease Control and Prevention (CDC). “18 Month Online Milestone Checklist.” https://www.cdc.gov/ncbddd/actearly/milestones/checklist/18-Month-Checklist-form.html
4. Centers for Disease Control and Prevention (CDC). “Clinical Screening for Autism Spectrum Disorder.” https://www.cdc.gov/autism/hcp/diagnosis/screening.html
5. Centers for Disease Control and Prevention (CDC). “Signs and Symptoms of Autism Spectrum Disorder.” https://www.cdc.gov/autism/signs-symptoms/index.html
6. National Autism Association. “Autism Screening.” https://nationalautismassociation.org/about-autism/autism-screening/
7. Robins, D., Fein, D., and Barton, M. “Modified Checklist for Autism in Toddlers, Revised with Follow-Up (M-CHAT-R/F).” https://mchatscreen.com
8. Penfield Children’s Center. “Developmental Milestones: 18 Months.” https://penfieldchildren.org/kohls-building-blocks/developmental-milestones/developmental-milestones-18-months/
9. Mayo Clinic. “Toe Walking in Children.” https://www.mayoclinic.org/diseases-conditions/toe-walking/symptoms-causes/syc-20378410
10. Early Childhood Technical Assistance Center (ECTA). “Why Children with Communication Delays Need Hearing Tests.” https://ectacenter.org/~pdfs/topics/earlyid/CT_WhyChildrenwithCommunicationDelaysNeedHearingTests_1.pdf

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