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Little milestones, kept forever

When first smiles, rolls, sits and steps usually arrive — and how to keep them forever. Milestones are what most babies (about 3 in 4) can do by each age — a calm guide, not a test.

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This section is being written now — new guides land here as they are published, one careful guide at a time.

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Milestones & keepsakes

Baby Sleep guides

Wake windows, nap schedules and regressions — the other half of the first year.

Common questions

What exactly is a baby milestone?

A milestone is something most babies — about 3 in 4 or more — can do by a particular age, such as smiling, rolling or sitting. Milestones describe what is typical, not what is required.

At what ages are milestones usually checked?

In the first year, the CDC's checklists use checkpoints at 2, 4, 6, 9 and 12 months, covering movement, language, social-emotional and learning skills.

Is crawling a milestone?

Crawling is not on the CDC's checklist — many healthy babies skip crawling altogether and move straight to pulling up and cruising. It is a good reminder that babies develop in their own order.

What if my baby seems slower than the chart?

Wide ranges are normal, and milestones are a guide, not a test — many babies do one skill early and another later. If you are ever worried, your pediatrician is the right person to ask; that is exactly what check-ups are for.

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