My 15-month-old son pulls to stand on ev
Ask
My 15-month-old son pulls to stand on everything and cruises sideways along the couch and coffee table very smoothly.
However, he refuses to let go and will not take a single step independently without holding our hands.
His grandparents keep telling us he is delayed because his cousins were all walking at 10 or 11 months.
He was born full-term at 39 weeks.
Can you explain:
1. What does the CDC 15-month milestone checklist (75%+ of children) say about independent walking?
2. What is the WHO normal population window for independent walking?
3. What dated observation should we note down to bring to his 18-month pediatrician visit?
Answer
I'll read the matching checklist and the walking-window reference to answer your three questions directly.
What you're describing at 15 months — pulling to stand, smooth cruising, no independent steps yet — is one common pattern. Here is what each of your three questions turns up, and what to write down before the 18-month visit.
**1. CDC 15-month checklist (75%+)**
The Movement row at 15 months lists two things:
- Takes a few steps on his own
- Uses fingers to feed herself some food
So at 15 months, 75%+ of children are taking a few independent steps. He is not yet on that row.
Source: https://www.cdc.gov/act-early/milestones/15-months.html (accessed 2026-09-02)
**2. WHO normal population window for independent walking**
| Milestone | 1st–99th (months) |
| --- | --- |
| Walking alone | 8.2–17.6 |
He is at 15 months — comfortably inside the window, with roughly 2.6 months before the upper end. The band is population variation across healthy children, not a home percentile and not a pass/fail line. About 4.3% of the WHO healthy sample never showed hands-and-knees crawling at all, so skipping a step between cruising and walking is not automatically a problem.
Source: https://www.who.int/tools/child-growth-standards/standards/motor-development-milestones (accessed 2026-09-02)
**3. Dated observation to bring to the 18-month visit**
Because "takes a few steps on his own" is the one item on the 15-month card he is not yet doing, and the 18-month visit is already on the calendar, this is where to raise it — not at a later, separate appointment.
| Date | Write this down | Bring it to the 18-month visit |
| --- | --- | --- |
| 2026-09-17 | "15 months, full-term (39 wk). Pulls to stand, cruises sideways smoothly along couch and coffee table. efuses to let go. No independent steps. No earlier skills lost." | Ask the pediatrician for a formal developmental screening, not just a casual chat. |
What would change this reading: has he started letting go and standing on his own for a second or two without holding anything?