Milestones & developmental checks

Milestones are a framework for observation, not a race to finish. Explore emerging skills and ways to bring your questions about development to a professional.

Official Sources Reliable Content Up-to-date Info Practical Tips

Milestones are a framework for observation, not a race to finish. Explore emerging skills and ways to bring your questions about development to a professional.

Official Sources Reliable Content Up-to-date Info Practical Tips

Milestones & developmental checks Guide(6 items)

See All

Filter this topic's content by age or search.

Building blocks with simple shapes, a pair of small first-step shoes and a yellow pull-along duck on wheels

Growth & Development

Development from 1 to 3 Years

Learn what to expect as your child grows from 1 to 3 years, with everyday ways to support movement, communication, play, and emotional growth—without pressure or checklists.

6 min read|1-3 Years

Read

An open notebook with a checked observation list and a rising line chart, a yellow pencil and a magnifying glass

Growth & Development

Child Development at 6–9: What Changes, What to Watch

Learn what to expect as your child grows between ages 6 and 9, with practical ways to support their unique development across movement, learning, emotions, and friendships.

6 min read|6-9 Years

Read

A stack of books, a purple school backpack, a pastel orange ball and a pair of headphones

Growth & Development

Your 9–12-Year-Old: What to Expect and How to Support Them

Between ages 9 and 12, children grow in overlapping waves of physical, cognitive, and social change. Learn how to recognize broad developmental patterns and provide steady support through routines, conversation, and shared responsibility.

6 min read|9-12 Years

Read

A child's drawing of a house and sun on paper, three pastel crayons and colorful steps with a flag on top

Growth & Development

Developmental Milestones for Ages 3–6

Understanding typical developmental milestones between ages 3 and 6 can help parents support their child’s growth through play, routines, and responsive interactions. Learn what to expect and how to encourage progress without pressure.

6 min read|3-6 Years

Read

A mother and father support their child's development together during a building activity

Growth & Development

Child Development: What to Expect at Each Stage

Understand child development as a variable, interconnected process shaped by context, opportunity, and individual differences. Learn how to observe, support, and nurture growth through everyday routines without rigid timelines or comparisons.

6 min read|0-12 Months · 1-3 Years · 3-6 Years · 6-9 Years · 9-12 Years · 12-18 Years

Read

A parent observes their two-year-old during play and takes notes

Growth & Development

Development Checks from Birth to Age 6

From babyhood to preschool (ages 0–6), learn the difference between everyday monitoring, screening and assessment, and record useful observations without turning childhood into a test.

7 min read|1-3 Years

Read

Tools for this topic

See All

Calculators, schedules and checklists — sign in and the results are saved to your child's profile.

Baby milestones by monthCheck off what most children your child's age can do, and talk about the rest with your doctor.

Growth & Development

Sub Topics

Height, weight & growth · Motor skills · Language & speech · Thinking, learning & play · Social & emotional development · Milestones & developmental checks

7Sub Topics

18Content

Featured

Baby and Toddler Growth 0–3: WHO Height and Weight by Month

Track your baby's and toddler's height and weight from birth to 3: WHO values by month for the first year, how to read the growth chart at 1–3, normal ups and downs, and when to seek help.

Read

Milestones & developmental checks

Milestones & developmental checks Guide(6 items)

Development from 1 to 3 Years

Child Development at 6–9: What Changes, What to Watch

Your 9–12-Year-Old: What to Expect and How to Support Them

Developmental Milestones for Ages 3–6

Child Development: What to Expect at Each Stage

Development Checks from Birth to Age 6

Tools for this topic

Growth & Development

Height, weight & growth

Motor skills

Language & speech

Thinking, learning & play

Social & emotional development

Milestones & developmental checks

Puberty & body changes

Development from 1 to 3 Years

Baby and Toddler Growth 0–3: WHO Height and Weight by Month