Watching your baby change week by week is one of the great joys of the first year — and also one of the great sources of 2am googling. Is she rolling on time? Should he be babbling by now? Here's a relaxed month-by-month guide to the major baby milestones, with one big caveat up front: healthy babies hit milestones across wide, overlapping windows, and "typical" is a range, not a deadline.
0–3 months: getting to know the world
In the first three months, your baby learns to focus on your face, startles at sounds, and begins to lift their head during tummy time. The famous first social smile usually arrives between six and eight weeks — a moment that makes every sleepless night briefly worth it. By three months, many babies coo, follow objects with their eyes, and have discovered their own hands.
4–6 months: movement begins
This is the era of rolling — usually front-to-back first, then back-to-front. Babies start reaching and grabbing (your hair, your glasses, your dinner), laugh out loud, and babble strings of sounds. Around six months, many can sit with support, and some begin sitting independently. Solid foods usually enter the picture now too, adding a whole new sensory adventure.
7–9 months: on the move
Between seven and nine months, expect independent sitting, pivoting, and for many babies the beginnings of crawling — though some scoot, roll or bottom-shuffle instead, and a few skip crawling entirely. Object permanence clicks in, which makes peekaboo hilarious and separations harder. Babbling gets more speech-like, with "mamama" and "dadada" strings that don't quite mean anyone yet.
10–12 months: standing tall
The last stretch of the first year often brings pulling to stand, cruising along furniture, a precise little pincer grip, waving bye-bye, and responding to their own name. Somewhere around the first birthday many babies say a first true word and some take first independent steps — but walking anywhere between 9 and 18 months is considered normal, so resist comparing notes at playgroup too seriously.
When to check in with your doctor
See your child health nurse or GP if your baby isn't smiling by three months, isn't making eye contact, shows a strong persistent preference for one side of the body, isn't sitting by nine to ten months, doesn't respond to sounds or their name, or loses skills they previously had. Most of the time there's a simple explanation, and where support is needed, earlier is always better.
Every baby writes their own timeline
Milestone charts are averages drawn from millions of different babies — your baby is exactly one of them. Premature babies in particular should be tracked from their due date, not their birth date, for the first two years. What matters most is steady progress over months, not any single skill on any single day. That's the philosophy behind Littlest: our companion tracks your baby's own trajectory and celebrates their personal firsts, rather than ranking them against an imaginary average baby.
This article is general information, not medical advice — for any concerns about your baby's development, your doctor or child health nurse is the right first stop.
