Developmental milestones by age describe skills most children can do by a certain point in how they play, learn, communicate, behave and move. They are monitoring tools, not diagnostic tests. One missed item does not explain why a child is developing differently.
What developmental milestones can tell you
Milestones help families notice patterns and changes. The CDC’s current checklists place milestones at ages when at least 75 percent of children would be expected to show them. A child can reach some early and others later.
Look across domains rather than focusing only on speech or walking. Communication, social connection, problem-solving, fine motor and gross motor skills develop together but not always at the same pace.
Birth to 12 months
During the first year, babies increasingly respond to people and sounds, take turns making noises, explore objects and gain control of their bodies. By around 12 months, many play an interactive game, call a parent by a special name, put an object into a container and pull to stand.
Watch how your baby communicates before words. Looking, reaching, showing, babbling and copying are meaningful. Limited response to sound should prompt a hearing conversation.
From 12 to 24 months
Between one and two, children become more intentional. By around 18 months, many point to show something interesting, follow a simple direction, try several words, walk independently and copy a familiar household action.
By two, many put two words together, look at a caregiver’s face in a new situation, run, kick a ball and use more than one toy in a connected play sequence. Observe understanding and gestures as well as spoken vocabulary.
Ages two to three
Language, pretend play and independence expand quickly. Many children begin short back-and-forth conversations, ask simple questions, join other children in play, draw a circle after a demonstration and manage more dressing and eating tasks.
Frustration and uneven skills remain common. Context matters: a tired child in an unfamiliar clinic may show less than they do at home.
Ages three to five
Children usually develop longer conversations, more complex pretend play, growing awareness of other people and greater control of movement and self-care. By five, many follow rules or take turns in games, recognise simple rhymes, write some letters in their name and hop on one foot.
Normal variation or reason for concern?
Ask three questions. Is your child continuing to gain skills? Are differences limited to one area or spread across several? Do they interfere with communicating, playing, learning or daily participation?
Loss of a skill should be discussed promptly. So should a cluster of missed milestones, limited progress or a parent’s persistent concern. Screening gives a more structured view than a milestone checklist and may lead to assessment.
Use a checker without letting it label your child
Complete the free child milestone checker based on what your child usually does, not their best day or a pressured test. Save examples and take the results to a paediatrician if concerns appear.
Remember: a milestone checklist cannot diagnose autism, ADHD, language disorder or another condition. It helps identify which observations may deserve professional discussion.
What happens after a concern?
A paediatrician may review health and development, check hearing and vision, use a validated screener or refer to a developmental professional. Support can often address an identified need while diagnostic questions are still being considered.
Frequently Asked Questions
Common domains include communication, social and emotional development, thinking and problem-solving, gross motor movement, fine motor skills and participation in everyday activities.
No. Children develop at different rates. A missed milestone becomes more informative alongside other concerns, limited progress, lost skills or difficulty participating in daily life.
Monitoring is ongoing observation by caregivers and professionals. Screening uses a validated tool at specific points to identify children who may need a fuller assessment.
Contact a professional if skills are lost, several milestones are absent, progress has stalled or you remain concerned despite reassurance from people around you.
Check your child’s milestones
Use the free eMbrace tool to organise your observations and identify questions to take to a developmental professional.
Open the Milestone Checker