DevelopmentAge 12-18 monthsEvidence-based

Insight

What Are Typical 12 to 18 Month Milestones?

Published February 10, 2026Updated February 10, 2026

Quick Answer

Typical milestones for children aged 12 to 18 months involve significant advancements in physical, cognitive, and social development. These milestones include walking, talking, and engaging with others.

Key Takeaways

  • Typical milestones for children aged 12 to 18 months involve significant advancements in physical, cognitive, and social development. These milestones include walking, talking, and engaging with others.
  • Evidence shows that by 12 months, approximately 50% of children can say at least one word - according to the AAP.
  • The CDC recommends that children should be able to walk independently by 15 months.
  • Studies indicate that most children can point to objects or people by 12 months, which is crucial for communication development.
  • According to CDC guidelines, children should be able to play simple pretend games, such as feeding a doll, by 18 months.
  • WHO guidelines suggest that by 18 months, children should be able to say at least 5-10 words and understand many more.
  • Research published in the Journal of Pediatrics indicates that social engagement, such as showing fear of strangers, is common by 12 months.

Quick Answer

Typical milestones for children aged 12 to 18 months involve significant advancements in physical, cognitive, and social development. These milestones include walking, talking, and engaging with others.

What You Need to Know

During the ages of 12 to 18 months, children undergo rapid development across several domains: motor skills, communication, and social interactions. Understanding these milestones can help parents and caregivers support their child's growth and identify any potential developmental delays.

Evidence-Based Guidelines

According to the American Academy of Pediatrics (AAP), the following developmental milestones are typically expected:

  • Physical Development: By 12 months, most children can sit without support, pull up to stand, and may take a few steps. By 15 months, they should be able to walk independently.
  • Communication Skills: The CDC recommends that by 12 months, children should say at least one word and by 18 months, they should be able to say about 5-10 words. This is important for their cognitive development.
  • Social and Emotional Development: Research shows that children often exhibit signs of attachment and may show fear of strangers by 12 months. By 18 months, they engage in simple pretend play.

Common Questions Parents Ask

Parents often wonder about the typical milestones for their children. It is essential to engage in activities that promote development:

  • Interactive play can boost communication skills.
  • Reading together fosters language and cognitive skills.
  • Encouraging exploration helps develop motor skills.

Safety Considerations

While observing these milestones, it's vital to ensure a child's environment is safe. Remove hazards to prevent falls as children begin to walk. Supervision during playtime is crucial to avoid accidents.

When to Contact Your Pediatrician

If your child does not show the following signs, you should consult your pediatrician:

  • Not walking by 15 months.
  • Not saying any words by 12 months.
  • Not engaging in simple pretend play by 18 months.

The Bottom Line

Tracking developmental milestones is crucial for understanding a child's growth and ensuring they receive the support they need. According to the CDC, AAP, and WHO, timely intervention can make a significant difference in a child's development. If there are concerns about milestones, always consult with a healthcare provider.

Frequently Asked Questions

What are some communication milestones for 12 to 18 months?

By 12 months, many children can say one or two words, while by 18 months, they can say about 5-10 words. The AAP emphasizes the importance of verbal communication at this age as it signifies cognitive development.

How can I encourage my child's development during this age?

Engage in interactive play, read books together, and encourage exploration. According to the CDC, these activities help foster language and motor skills.

When should my child start walking?

Most children take their first steps between 12 to 15 months. The CDC advises that if your child is not walking by 15 months, you should consult your pediatrician.

What social skills should I expect by 18 months?

By 18 months, children often show signs of social engagement, such as playing alongside other children and showing fear of strangers. The AAP highlights these behaviors as normal milestones.

Is it normal for my child to be shy around strangers?

Yes, it is common for children to exhibit shyness or fear around unfamiliar people by 12 months. This is a typical developmental milestone as they start to form attachments.

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Medical Disclaimer

This content is educational and does not replace professional medical advice. Always consult your pediatrician for personal health concerns.

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