Development includes movement, play, communication and interaction. Age examples help you notice progress, but a checklist cannot diagnose a delay.
Your friend's child may already be walking while yours is learning to stand. Another child talks more, but your child enjoys pointing out objects and playing with you. These comparisons can leave parents wondering which differences matter.
Child developmental milestones describe skills that tend to appear as children grow. They help families and clinicians notice progress across several areas. They are useful conversation starters, rather than a score of intelligence or a way to predict a child's future.
The direct answer
Look at how your child moves, uses their hands, understands, communicates and interacts—not just one new skill. Some variation is expected. However, a missed age-appropriate milestone, a skill that has disappeared, or a concern you repeatedly notice deserves a discussion with a paediatrician. You do not need to wait for several areas to be affected before asking.
The examples below are selected from current public developmental checklists. They are not a complete checklist, a diagnostic test or rigid deadlines for every child. The purpose is to help you describe what you see and ask appropriate questions.
What counts as development?
Physical growth and developmental skills are related but different. Weight and height describe size; development describes abilities. A child may grow along an expected weight curve and still need help with communication or movement. For the separate growth question, read about a child not gaining weight.
Notice four broad areas together:
- Movement and hand use: holding the head, sitting, walking, grasping, scribbling and using everyday objects.
- Communication: sounds, gestures, understanding words and gradually using language to share ideas.
- Learning through play: exploring, finding objects, solving simple problems and pretend play.
- Social interaction: sharing attention, responding to familiar people, joining play and taking turns.
The areas overlap. Pointing to show you an interesting object involves communication and social connection; drawing involves both hand control and learning. Knowing the exact category is less important than noticing the behaviour.
Age examples: what might you notice?
| Age | Selected examples to observe |
|---|---|
| By 2 months | Looking at your face, smiling in response to you and reacting to a loud sound |
| By 6 months | Recognising familiar people, taking turns making sounds and reaching for a wanted toy |
| By 1 year | Waving goodbye, using a special name for a parent and pulling up to stand |
| By 18 months | Walking without support, pointing to share something interesting and trying several words beyond names for parents |
| By 2 years | Putting two words together, running and using more varied gestures |
| By 3 years | Joining other children in play, brief back-and-forth conversation and drawing a circle after being shown |
| By 4 years | Pretend play, sentences of four or more words and talking about something that happened during the day |
| By 5 years | Taking turns in a game, telling a simple story with connected events and counting to ten |
These are examples, not an examination to perform at home. Observe skills in normal, familiar situations. A tired child or a child who is uncomfortable with strangers may not show everything during one encounter. If you are unsure whether a skill is present, describe the uncertainty to the doctor.
How should parents use a milestone chart?
Choose information for your child's current age and keep a short record of what is present, what is emerging and what concerns you. Dates and real examples are more helpful than labels such as “slow” or “behind.” You might record that your child points to a bird to share interest, or that a previously used word is no longer heard.
Use the chart to support a conversation, not to train your child for a checklist. Repeatedly testing a child, comparing siblings or setting a daily performance target can make observation less useful. A short video of natural play can help a clinician understand behaviour that is difficult to describe, provided recording is safe and does not disturb the child.
Does normal variation mean we should wait?
Variation does not mean every concern can be ignored. A paediatrician considers the full pattern, the child's age and health history, and whether progress continues. An isolated difference may need monitoring; another concern may justify a formal assessment or referral. Only an assessment can help distinguish these situations.
For a baby born early, the clinician may use corrected age when interpreting early development. This accounts for the time before the expected due date. Bring the birth date, expected due date and neonatal records rather than adjusting an online chart yourself and assuming everything is explained.
When should you ask for an assessment?
Raise developmental questions during routine child-health visits even when there is no obvious problem. Arrange a review if an expected skill is absent, progress seems to have stopped, hearing or vision seems uncertain, or communication and interaction worry you.
Contact the paediatrician promptly if your child loses a skill they previously used, such as speech, interaction or movement. Do not dismiss this as laziness or wait for school to start. A concern is worth discussing even if an online checklist appears reassuring. Sudden severe changes in health need immediate qualified medical evaluation.
Speech deserves attention as part of this wider picture. Describe what your child says, understands and communicates with gestures. A speech concern does not by itself establish a particular developmental diagnosis.
What happens during a paediatric assessment?
The doctor asks about pregnancy and birth history, previous illness, daily play, language exposure and your observations. Examination may include growth, movement, hearing-related responses and interaction. The clinician may ask you to complete a validated developmental screening questionnaire.
A checklist for families and a formal screening tool have different purposes. Screening identifies children who may benefit from further evaluation; it does not automatically establish a diagnosis. Hearing, vision or specialist assessment may be considered when the history and examination suggest it. Not every child needs a scan or the same set of investigations.
If support is needed, the plan may include a developmental specialist, speech and language assessment, or help for movement and everyday skills. The type of help and follow-up depend on the child's needs. An early referral is an opportunity to understand and support the child; it is not a promise of a particular outcome.
What should you bring and ask?
Bring birth and earlier health records, a short skills timeline and concerns from caregivers or preschool staff. Record the languages spoken with the child and what the child understands or says in each. Mention feeding, growth and sleep concerns where relevant; they may help explain the wider picture. Our feeding-difficulty article addresses a different but sometimes accompanying concern.
Ask which skill needs closer assessment, whether a referral is useful, what progress to watch for and when to return. A clear follow-up plan is more useful than either a vague instruction to wait or a long list of tests without an explanation.
Frequently asked questions
Can a milestone chart diagnose a developmental delay?
No. It helps you notice skills and describe concerns. Diagnosis requires a clinical assessment; formal screening is also different from diagnosis.
Must a child walk independently on the first birthday?
No. The one-year checklist includes pulling up to stand and walking while holding furniture. Independent walking appears later in the examples. Discuss your child's overall movement and progress rather than one birthday deadline.
Does delayed speech always mean autism?
No. Speech differences can have several explanations. A clinician considers hearing, understanding, gestures, interaction and other development before deciding what further assessment is needed.
Should we mention concerns if preschool says everything is fine?
Yes. Share specific examples from home and the preschool's observations. Children may behave differently in different settings, and the clinician can consider both.
What if my child stops doing something they could do before?
Contact the paediatrician promptly and describe the skill and when it changed. Loss of an established skill deserves assessment rather than reassurance based only on a chart.
Your next step
Use the hospital services directory and doctor directory to arrange appropriate child-health care. You can book an appointment with a short description of the concern. Bring observations rather than a score: the goal is a practical assessment and a plan suited to your child.
