Month 13 of 24 · Window 6 · First steps and first words
Your 13-month-old: milestones and what to expect
Thirteen months sits in the quiet gap between two official CDC stops, at 12 and 15 months, so nothing is due this month. Most children are somewhere between cruising along the furniture and taking a first few steps, and many are still working toward a first real word. All of those timelines are normal.
Checked against CDC, AAP and NHS guidance · how we fact-check
Most babies do these by 12 months (CDC)
Social & emotional: Plays games with you like pat-a-cake · waves "bye-bye".
Language & communication: Calls a parent "mama", "dada", or another special name · understands "no".
Movement & thinking: Puts something in a container · looks for things they see you hide · pulls up to stand · walks holding on to furniture · drinks from a cup you hold · picks things up between thumb and pointer finger.
The next official CDC checklist is at 15 months, between checklists, children work on these same skills at their own pace.
What you might notice
The 1992 research listed one more fussier stretch around week 62. A later study that followed four babies to about 15 months did not find a strict timing pattern, so treat it as a possibility, not a schedule. This window is mostly about first steps, first words, and a lot of showing you things.
What can help this month
Read the same books again and again, name what your child points at, and let them try things before you step in. Walking often starts with a few steps and a lot of sitting back down, and that is practice, not a setback. Check that low furniture and stairs are safe now that your child is on the move.
And you: Some days will be all clinging and some all wandering off. Both are normal at this age. You are not doing it wrong, and you do not need to have it figured out.
Talk with your pediatrician if…
Your baby is missing one or more of the milestones above by 15 months, or has lost skills they once had. That is the CDC's own advice: don't wait, talk with the doctor and ask about developmental screening. And if you're simply worried, that's reason enough to call.
Coming up: after this window comes "exploring and copying" (weeks 65 to 78). No deadlines, windows.
Want the personal version?
This page covers what's typical at 13 months in general. For your own baby's map, including adjusted age for premature babies, run the free forecast.
See my baby's exact forecastSources: CDC milestone checklists (2022 revision) · Zubler et al., Pediatrics 2022 · van de Rijt-Plooij & Plooij, 1992 (via KNAW review) · Sadurní & Rostan, 2002. Timing varies a lot between babies, windows, not deadlines.