My son is exactly 18 months old today (b
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My son is exactly 18 months old today (born full-term at 39 weeks). We live in the US.
Currently, he only says one recognizable word consistently: 'mama'.
However, he understands everything we say, points with his index finger to show us things or ask for snacks, waves bye-bye, claps, and turns immediately when we call his name.
Our 18-month well-child visit with the pediatrician is next Thursday.
How does his speech compare to the CDC 18-month milestone checklist, and what should we bring or ask the doctor regarding a developmental screening?
Answer
At 18 months exactly, the CDC 75%+ list says most children **try to say three or more words besides "mama" or "dada"** — your son is below that line on expressive words right now.
The other language item, "follows one-step directions without any gestures" — you said he understands everything, so receptive language looks strong. The social items you described are on the same card: pointing with the index finger, waving, clapping, turning when called. Joint attention and social communication matter alongside word count, not instead of it.
**What the numbers do and don't say here**
The 75% line is a monitoring checkpoint, not a screening result. WHO windows exist for sitting / crawling / standing / walking only — there is no comparable band for speech to fall back on, so the reading rests on the checklist and the pediatrician's screening.
**For next Thursday**
| Bring, dated today | Ask the pediatrician |
| --- | --- |
| Words or word-attempts in the last month (including "dada" if he says it, any animal sound that means a specific thing) | equest a formal developmental screening — AAP schedules general screening at 18 months and an autism-specific one at 18 and 24 months, so both usually happen at this visit |
| Gestures: pointing (yes), waving, clapping, showing — with date | Say the word-count worry out loud so it's on the record |
| "Turns when name is called in a quiet room" — yes, today | Ask what would warrant a re-check before the 24-month visit |
| Whether he looks back to check you're close, or brings an object to show | — |
If he has not added words in the next 2–3 months after the visit, that is the window where a re-screen matters — not because one visit decides anything.
Source: https://www.cdc.gov/act-early/milestones/18-months.html (accessed 2026-09-02)
Has he started putting two words together (like "more milk" or "mama go"), or any word combinations at all?