The 12-month checklist

The CDC revised its milestone checklists to list skills that most children (about 75%) can do by each age. At 12 months its list includes:

  • Social: plays games with you, like pat-a-cake
  • Language: waves bye-bye; calls a parent "mama", "dada" or another special name; understands "no" (pauses or stops briefly when you say it)
  • Thinking: puts something in a container, such as a block in a cup; looks for things they see you hide, such as a toy under a blanket
  • Movement: pulls up to stand; walks holding on to furniture; drinks from a cup without a lid as you hold it; picks things up between thumb and pointer finger

Independent walking is not on the CDC 12-month list: its 15-month checklist includes taking a few steps on their own. WHO data agree that there is a wide window, with walking alone achieved between about 8.2 and 17.6 months in healthy children.

What else you may notice at 12 months

  • Walking attempts: Some babies walk alone at 12 months; many cruise and take their first independent steps over the following months.
  • Personality and independence: Preferences, protests and attachment to a comfort object become clearer.
  • Imitation: Copying actions such as brushing hair or talking on a toy phone.
  • Separation anxiety: It often continues. See our separation anxiety guide.

Sleep at 12 months

The AASM consensus, endorsed by the AAP, recommends 11–14 hours of sleep per 24 hours (naps included) for ages 1–2. Most 12-month-olds are on two naps and move to one between about 14 and 18 months; our wake window calculator lists about 180–240 minutes at 10–14 months. Sleep often changes around the first birthday: read the 12-month sleep regression guide and the 12–24 month sleep schedule hub.

Free tool: wake window calculator →

Feeding at 12 months

Around 12 months, whole cow's milk and honey can be introduced, according to CDC guidance, and many families begin moving from bottle to cup. Offer a variety of family foods; see our solid foods guide. Your pediatrician can advise on milk amounts.

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How to support your 12-month-old

1

Let your baby move

Safe floor space, cruising routes and push toys that are stable (not wheeled walkers) support walking at your baby's own pace.

2

Name things and read together

Point and name objects; read picture books and pause so your baby can respond.

3

Play simple games

Pat-a-cake, hide-and-find and putting blocks in a cup build the exact skills on the 12-month list.

4

Offer a cup and finger foods

Practice with an open cup and soft pieces of family food.

5

Keep routines steady

A consistent nap and bedtime routine gets you through the 12-month regression and later nap changes.

6

Prepare for the 12-month visit

Write down skills you see and questions to bring to the well-child visit.

When to talk to your pediatrician

Milestone timing varies widely between healthy children, and one missed item is rarely a diagnosis. Bring your notes to the well-child visit and ask early if you see any of the following, or simply feel something is off:

  • does not crawl, does not bear weight on the legs with support, or cannot stand when supported
  • does not use gestures such as waving or pointing, or does not respond to their name
  • does not say words like "mama" or "dada" or does not babble
  • does not search for things you hide, or does not play games like pat-a-cake
  • loses a skill they previously had

Early evaluation is not an overreaction: the CDC's "Learn the Signs. Act Early." program exists so concerns are raised sooner rather than later, and your pediatrician can refer for a developmental screening if needed.

Sources

Disclaimer: This article is for general guidance and does not replace advice from your pediatrician. Timelines are ranges that vary between healthy children. If you are worried about your baby's sleep or development, consult your doctor.