Child Growth & Development
Children grow along their own curve, and the shape of that curve over time says far more than any single measurement. This covers what is measured, what the milestones are, and — most usefully — which delays should prompt a conversation rather than a wait.
Reviewed by Dr. Mohan Gayenlast reviewed
Every child develops at their own pace and the ranges below are wide on purpose. What matters is the TREND on your child’s own growth chart and any LOSS of a skill they already had. Losing a skill is always a reason to see a doctor.
Numbers are listed for 55 countries and can change — if your country is not here, or you are not sure, 112 reaches emergency services across the European Union and works from a mobile in much of the world. Do not drive yourself.
What growth monitoring actually watches
A single weight tells you very little. Plotted over months on a growth chart, the same weights tell you a great deal — because the question is not "which percentile?" but "is the child staying on their own line?"
- CROSSING DOWNWARDS through percentile lines over successive visits is the finding that matters, far more than being on a low percentile consistently.
- Weight responds fastest to illness or poor intake. Height responds over months. Head circumference reflects brain growth and matters most in the first two years.
- A child on the 10th percentile who has always been there is usually just a smaller child. A child who has fallen from the 50th to the 10th needs assessment.
- Bring the growth chart to every visit and keep it — it is the record that makes all of this readable.
Developmental milestones — the usual ranges
| Age | Typically able to |
|---|---|
| 2 months | Smiles socially · follows a face with the eyes · lifts the head briefly when on the tummy |
| 4 months | Holds head steady · pushes up on forearms · laughs · reaches for a toy |
| 6 months | Rolls over · sits with support · babbles · turns to a voice |
| 9 months | Sits without support · crawls or shuffles · picks up small objects · responds to their name |
| 12 months | Pulls to stand · may take steps · says one or two words with meaning · waves |
| 18 months | Walks well · says several words · points to things they want · scribbles |
| 2 years | Runs · joins two words · follows a simple instruction · uses a spoon |
| 3 years | Speaks in short sentences · understood by strangers most of the time · climbs stairs alternating feet |
| 4 years | Tells a simple story · draws a person with a few parts · hops on one foot |
| 5 years | Speaks clearly in full sentences · dresses with little help · counts small numbers |
When to ask a doctor rather than wait
- ANY LOSS OF A SKILL the child previously had — words, walking, social contact. This is always significant, at any age.
- Not smiling socially by 3 months, or not responding to sound at any age.
- Not sitting without support by 9 months, or not walking by 18 months.
- No words by 18 months, or no two-word phrases by 2 years.
- Not making eye contact, not responding to their name by 12 months, or little interest in other people.
- Persistent squint after 3 months, or any concern about vision or hearing at any age.
- Crossing downwards through percentile lines on the growth chart, or no weight gain over two months in an infant.
- A strong parental feeling that something is not right. It is a better test than most, and it is never a waste of an appointment.
Feeding, briefly
- Exclusive breastfeeding is recommended for the first six months — no water, no other milk, no food.
- Complementary feeding starts at six months alongside continued breastfeeding, which can continue to two years and beyond.
- Start with soft, mashed food; increase texture and variety steadily. Introduce one new food at a time.
- No added salt or sugar in the first year, and no honey at all before 12 months because of the risk of infant botulism.
- Iron-rich foods matter from six months — iron deficiency is very common in Indian infants and affects development.
This is general health information for education, not medical advice, and not a diagnosis. It cannot see you, your history, your allergies or your medicines. Never use it to start, stop or change a treatment, and never let it delay you seeking care. If you are worried about symptoms, speak to a qualified doctor; if they are severe or sudden, seek emergency help.
Where this comes from: Milestones and growth monitoring principles consistent with WHO child growth standards and widely published developmental guidance.
Where this is written from: This site is written from Indian clinical practice. Drug availability and brand names, vaccination schedules, national health programmes and some reference cut-offs differ between countries — a schedule or a threshold that is standard here may not be standard where you are. If you are reading outside India, check anything on this page against your own country’s guidance before you act on it.
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Milestones, growth monitoring, and when to ask.