18 Months Milestones

The 18-month well-child visit is one of the most important checkups in early childhood. The CDC and the American Academy of Pediatrics recommend formal developmental and autism screening at 18 months. This is not because something is likely wrong - it is because early identification leads to early support, and early support leads to the best outcomes. If your pediatrician does not bring up screening, it is okay to ask for it. At 18 months, your toddler is a whirlwind of energy, curiosity, and big feelings. Tantrums are normal. Saying "no" to everything is normal. Wanting to do things themselves is normal. Your child is becoming an independent person, and that process is messy and loud and wonderful. If you have concerns about your child's development, trust yourself. Parents notice things early, and early action is always better than waiting and worrying. Early intervention services are available in every state and are often free or low-cost - ask your pediatrician about your options.

Walking Confidently

CDC WHO

Your toddler walks steadily without falling much and can start and stop on their own.

What it looks like

Your child walks across the room without holding onto anything, navigates around furniture, and rarely falls. Their gait is still wide and their arms may still be held up for balance, but walking is now their primary way of getting around.

Typical range

11 moavg 14 mo17 mo19 mo

When should I worry?

This is normal

By 18 months, most toddlers are walking on their own. Walking is still new for many of them, so wobbling and occasional falls are expected. Confidence builds over the next few months.

Mention at next visit

If your child is not walking independently by 18 months, bring it up with your pediatrician. An evaluation may be recommended.

Call your doctor

If your child was walking and has stopped, walks only on their toes persistently, or has a very uneven gait (always favoring one side), call your pediatrician.

Running (or Trying To)

CDC

Your toddler tries to run, though it may look more like fast, stiff walking.

What it looks like

Your child walks faster and faster until it turns into a kind of run - stiff-legged, arms out for balance, not very coordinated. They may fall when they try to stop. It is a run in their mind even if it looks like an enthusiastic toddle.

Typical range

14 moavg 17 mo20 mo2 yr

When should I worry?

This is normal

Not all 18-month-olds can run, and that is perfectly fine. Running develops after confident walking is established. If your child is still getting steady on their feet, running will come in time.

Mention at next visit

If your child cannot walk quickly or attempt to run by 20-21 months, mention it at your next visit.

Call your doctor

If your child seems to have difficulty with all movement or has lost motor abilities they once had, call your pediatrician.

Climbing on Furniture

CDC

Your toddler climbs onto chairs, couches, or up small stairs (with help).

What it looks like

Your child pulls themselves onto the couch, climbs up onto a chair, or crawls up stairs on hands and knees. They are fearless explorers, which can be nerve-wracking for parents but is developmentally healthy.

Typical range

13 moavg 16 mo19 mo22 mo

When should I worry?

This is normal

Climbing is a normal and healthy part of development. Your child is building strength, coordination, and spatial awareness. It is important to make sure their environment is safe for climbing rather than trying to prevent it entirely.

Mention at next visit

If your child shows no interest in climbing or cannot navigate stairs on hands and knees by 20 months, mention it at your next visit.

Call your doctor

If your child seems to have significant difficulty with physical activities that other toddlers their age do easily, call your pediatrician.

Related:motor delay low muscle tone

When to Talk to Your Doctor

Red flags to watch for

If you notice any of the following, contact your pediatrician. These signs do not necessarily mean something is wrong, but they are worth discussing with a professional.

Does not walk independently
What to do
Talk to your pediatrician. The CDC recommends evaluation if a child is not walking by 18 months.
Does not point to show you things
What to do
Bring this up with your pediatrician. Lack of pointing by 18 months should be evaluated.
Uses fewer than 5 words
What to do
Mention at your 18-month well-child visit. A developmental screening is recommended at this age.
Does not know what familiar objects are used for
What to do
Mention to your pediatrician at your next visit.
Does not copy or imitate others
What to do
Bring this up with your pediatrician.
Does not notice or react when a caregiver leaves or returns
What to do
Mention to your pediatrician. This is relevant to both attachment and social development.
Does not gain new words or has lost words they used to say
What to do
Call your pediatrician. Loss of language is always worth discussing promptly.
Does not engage in any pretend play
What to do
Mention to your pediatrician at your 18-month visit.
Has lost any skills they previously had (words, walking, social skills)
What to do
Call your pediatrician right away. Loss of skills at any age should be evaluated promptly.