Somewhere around month four, most parents scroll back to a photo from the first week and stop for a second. The baby in that picture is the same person, and also someone who has quietly moved on. A milestone list tells you roughly what might come next. A photo series shows you, looking back, what already happened.
This guide walks through the first year in four stages. For each one you will find what many babies do in that window, based on widely published guidance (the CDC's "Learn the Signs. Act Early." checklists, the WHO motor development study, the American Academy of Pediatrics and the NHS), followed by a photo idea that suits the stage. Nothing here is a test or a diagnosis. Think of it as a map with very wide roads.
How to read a baby milestone list
Three things are worth knowing before the month by month part, because they change how a list feels at 2am.
Checklists describe most babies, not all. The CDC revised its checklists in 2022 so that each item is something 75% or more of children do by that age. By design, about one baby in four has not done a given thing yet when the checklist age arrives.
The healthy range is wide. In the WHO study, healthy babies in five countries started walking on their own anywhere between 8.2 and 17.6 months. That is a gap of more than nine months between early and late walkers, and all of them were developing well.
The order varies. Some babies stand before they crawl. Some shuffle on their bottom for months. Some go from sitting straight to cruising along the sofa.
Every child develops at their own pace. A list is a conversation starter with your paediatrician, not a scorecard, and comparing your baby with a cousin of the same age tells you very little.
Months 0 to 3: faces, smiles and a steadier head
In the first weeks a baby sees most clearly at about 20 to 30 cm, which happens to be roughly the distance to your face during a feed. Faces are the favourite thing to look at. Many babies give their first social smile, the kind that answers your face rather than flickering in sleep, at around 6 to 8 weeks.
By about 2 months, the CDC checklist includes:
- smiling when you talk to or smile at them
- holding the head up briefly during tummy time
- making sounds other than crying, like small coos
- watching you as you move around
Between 2 and 3 months the head gets steadier, the hands open more often, and many babies discover their fists and bring them straight to the mouth. Short, supervised tummy time while baby is awake helps with head and neck strength. Our tummy time guide has gentle ways to start, even with a baby who protests after 30 seconds.
Photo idea: the same view from above
Lay a plain cotton cloth on the floor in your chosen spot, place baby on their back after a feed, and shoot from directly above with the phone held level. Kneel beside them instead of leaning over a bed or changing table, so baby is always on a low, flat surface with you right there. Take one frame a week. By week 12 you have twelve photos of the same view, and the change in cheeks, hands and alertness is obvious in a way it never is from one day to the next. The weekly cards in the Guide tab follow this rhythm for the first 12 weeks.
Months 4 to 6: reaching, rolling and sitting with support
This is when babies start acting on the world instead of only watching it. By about 4 months, the CDC checklist includes holding the head steady without support when held, pushing up onto the forearms during tummy time, bringing hands to the mouth, swinging at toys and chuckling.
By about 6 months many babies:
- roll from tummy to back
- push up on straight arms during tummy time
- lean on their hands for support when sitting
- reach for a toy they want
- laugh, blow raspberries and recognise familiar people
Around 6 months is also when the WHO and the NHS suggest starting solid foods for most babies, alongside milk. Signs of readiness, textures and allergens are worth talking through with your paediatrician first. If you would like to record the first tastes, the first foods photo diary has ideas that keep the camera out of the way of the spoon.
Photo idea: the reach
Get down to baby's eye level, hold one hand just out of reach at the edge of the frame, and take the photo as they stretch towards it. Use the same cushion or the same soft toy every month: next to a fixed object, growth reads instantly. If you want a sitting photo, sit baby in your lap or between your legs on the floor while a second adult holds the phone. At this age a baby should never be left propped up on their own, not even for a quick shot.
Months 7 to 9: sitting, moving and the first babble
By about 9 months, the CDC checklist includes:
- sitting without support, and getting into a sitting position alone
- moving things from one hand to the other
- raking food towards themselves with the fingers
- looking for things you drop out of sight
- babbling strings like "mamamama" and "babababa"
- lifting arms up to be picked up
- looking at you when you say their name
Many babies become shy or clingy with new people around now. It is a common stage, and it can make a visit to the grandparents look very different from last month's.
Crawling often appears in this window or a little later, but the WHO range for hands-and-knees crawling runs from 5.2 to 13.5 months, and a good number of babies never crawl in the classic way at all. Bottom shuffling, rolling across the rug or commando crawling on the tummy all count as getting around.
Photo idea: floor level
Lie on your stomach, rest your elbows on the floor and hold the phone at baby's eye height, about 50 cm away. Take several frames as they come towards you, using burst mode if your hands are full, and choose the best one later. A second monthly idea is the pause in the high chair just before the first spoon, taken from the same side each month. Our monthly milestone photo ideas has more setups for this age.
This is also a good moment to look at the room you photograph in with fresh eyes. A baby who can move will find cables, plant pots and anything on a low shelf within days.
Months 10 to 12: pulling up, cruising and first steps
By about 12 months, the CDC checklist includes:
- pulling up to stand
- walking while holding on to furniture, often called cruising
- picking up small things between thumb and pointer finger
- waving bye-bye
- calling a parent "mama", "dada" or another special name
- understanding "no" and pausing, at least briefly
- playing simple games like pat-a-cake
First independent steps can come near the first birthday or several months after it. A baby who takes their first steps at 15 or 16 months is well inside the range of healthy development.
Photo idea: back to the original spot
Take the one-year photo in exactly the place where the first-week photo was taken. Same wall, same window, same time of day, and let the difference speak for itself. Lining up a standing toddler with the memory of a newborn on a cloth is harder than it sounds, which is where a ghost overlay, the previous photo shown faintly on the camera, helps you match height and distance. For standing photos, hold the phone at your child's chest height, not your own, so their legs do not look short.
WHO windows for motor milestones
The WHO motor development study followed healthy babies in Ghana, India, Norway, Oman and the United States and recorded when they reached six big movement skills. The windows below run from the 1st to the 99th percentile, so they cover nearly every baby in the study.
| Milestone | Window in the WHO study |
|---|---|
| Sitting without support | 3.8 to 9.2 months |
| Standing with assistance | 4.8 to 11.4 months |
| Hands-and-knees crawling | 5.2 to 13.5 months |
| Walking with assistance | 5.9 to 13.7 months |
| Standing alone | 6.9 to 16.9 months |
| Walking alone | 8.2 to 17.6 months |
Two honest caveats. These are movement skills only; language, social and play skills follow their own timelines. And a window describes a large group of children. It is not a promise or a deadline for any single child.
When to talk to your paediatrician
You do not need a checklist to justify a question. The CDC's message is short: if you are concerned, act early and ask. Reasons parents often bring up with their paediatrician or health visitor include:
- Your baby loses a skill they already had, such as babbling, reaching or sitting.
- Your baby does not seem to react to loud sounds, or rarely looks at faces.
- Your baby seems very stiff or very floppy when you hold them.
- Several items on the checklist for their age have not appeared yet.
- Something simply feels off to you, even if you cannot name it.
The AAP recommends developmental screening at the 9, 18 and 30 month check-ups, so there are built-in moments to talk. One practical tip: record a 20 second video of whatever you are unsure about, a movement, a sound, the way baby reaches, and show it at the appointment. Babies rarely perform on cue in a doctor's office.
Only your paediatrician, who can examine your baby, can tell you what a pattern means. An article cannot, and neither can an app.
A simple photo rhythm for the first year
You do not need a photo every single day to see a year of change, although some families enjoy the daily habit. Here is a rhythm that survives short nights and busy mornings:
- Before birth: choose one spot with soft side light and a plain background.
- Weeks 1 to 12: one photo a week, same spot, same distance, same time of day.
- Months 4 to 12: one photo a month, on or near the monthly birthday.
- New skills: a few candid photos when something new happens, without trying to stage it.
- Month 12: the one-year photo in the original spot.
- After the birthday: turn the series into a short film. Our guide to the first year time-lapse video covers speed and length.
If you would like gentle reminders, the baby's age on every photo and month by month Guide cards in one place, TinyLapse on the App Store was built around this rhythm. And when the first year ends, the story keeps going: our article on toddler milestones from 12 to 36 months picks up where this one stops.
