Medically reviewed by Dr. Nidha P, MBBS, DNB (Paediatrics), Consultant Paediatrician
Milestone charts create more anxiety than almost anything else in the first year, usually because of a cousin's baby who walked at ten months.
So, two things before the chart. First: the ranges are wide, and being at the later end of a normal range is not a delay. Second: there is one signal that always matters regardless of timing, and it's at the end of this article.
What are the main milestones in the first year?
Approximate ages, understanding that a month either side is ordinary:
By 2 months — smiles at people, calms when spoken to or picked up, looks at faces, makes sounds other than crying, holds the head up briefly during tummy time.
By 4 months — smiles spontaneously to get your attention, chuckles, makes cooing sounds and responds when you talk, holds the head steady without support, pushes up on elbows during tummy time, brings hands to mouth.
By 6 months — recognises familiar people, laughs, takes turns making sounds with you, blows raspberries, rolls from tummy to back, leans on hands to support herself when sitting, reaches for and mouths toys.
By 9 months — is shy or clingy with strangers, shows several facial expressions, looks when you call her name, babbles strings like "mamama", sits without support, uses fingers to rake food, looks for objects when they drop out of sight.
By 12 months — plays games like pat-a-cake, waves bye-bye, calls a parent "mama" or "dada" or a special name, understands "no", pulls up to stand, cruises holding furniture, puts things in a container, drinks from a cup with help.
What varies enormously and doesn't matter much?
Walking. Anywhere from about nine to eighteen months is normal. Walking at eighteen months and walking at ten months lead to the same outcome.
Crawling. Some babies never crawl. They shuffle on their bottom, roll, or go straight to pulling up and walking. Skipping crawling is not a problem in itself.
Teeth. First teeth anywhere from around four to twelve months, occasionally later.
Talking. Babbling matters more in the first year than clear words. Most babies have one or two recognisable words around twelve months, and some don't.
Size and weight. Track the curve on the growth chart, not a single reading. Crossing centile lines downward matters; being small and staying steadily small usually doesn't.
If my baby was premature, how do I read this?
Use the corrected age — the age from the original due date rather than the birth date — for at least the first two years. A baby born two months early who sits at eight months is sitting on time at a corrected six months.
Your paediatrician will already be doing this. It resolves a lot of unnecessary worry.
When should I talk to a doctor?
Bring it up at your next visit if, by the ages below, your baby:
By 3 months — doesn't smile at people, doesn't respond to loud sounds, doesn't follow a moving object with their eyes, can't hold their head up at all
By 6 months — doesn't roll in either direction, seems very stiff or very floppy, doesn't reach for things, doesn't laugh or make squealing sounds, doesn't respond to sounds around them
By 9 months — doesn't sit with support, doesn't babble, doesn't respond to their own name, doesn't recognise familiar people, doesn't bear weight on their legs when held
By 12 months — doesn't crawl or move about in any way, doesn't point, doesn't search for a hidden object, doesn't say any single words, doesn't use gestures like waving or shaking the head, doesn't pull to stand
At any age — persistent squinting or eyes that don't move together, no reaction to sound, marked asymmetry using one side of the body far more than the other.
The signal that always matters
Losing a skill your baby already had. A baby who was babbling and stops, who made eye contact and no longer does, who was sitting and can no longer sit — that is a regression, and it needs medical attention promptly regardless of age or how everything else looks.
This is different from a temporary pause. Babies often plateau on one skill while working intensely on another, and a baby who is ill or teething may do less for a few days. Regression means the skill has genuinely gone and stayed gone.
What actually helps development?
Nothing you buy.
Talk constantly. Narrate what you're doing, in whatever language you speak at home. Babies raised with two or three languages do fine, and it doesn't cause delay.
Respond. When your baby makes a sound, answer it. That back-and-forth is how language is built.
Tummy time, from the early weeks, awake and supervised. Short and frequent. It builds the neck and shoulder strength that everything else depends on.
Floor time. Time on a safe flat surface does more than any walker or bouncer. Baby walkers are actively discouraged — they don't help walking and cause injuries.
Read together, even at three months.
Skip screens. Under eighteen months, other than video calls with family, screens aren't recommended.
Quick answers
My baby isn't crawling at nine months. Should I worry? Not on its own, if they're moving about some other way and meeting the other nine-month markers. Mention it at the next visit anyway.
Do milestone charts apply to Indian babies? The sequence of development is broadly universal. Growth charts are the thing to get right locally — ask which chart your paediatrician uses.
Is a walker useful? No. They delay independent walking rather than help it, and they're a common cause of serious falls. Paediatric bodies advise against them.
My baby only says "dada", not "mama". Is that a problem? No. "Dada" is easier to produce and often comes first. It says nothing about preference.
Should I compare with my older child? Only loosely. Siblings vary widely, and a second baby often does some things sooner and others later.
