What a 3-month-old baby does
At three months a baby pushes up on their forearms, follows moving things with their eyes, and begins reaching for what they can see. Milk is still the whole meal — solid food does not belong here yet — and floor time is what earns the first rolls.
What is my baby doing at 3 months?
- Your baby may be seeing colours — and their shades — much better.Source: AAP · Infant Vision Development
- Your baby may be babbling chains of sounds: ba-ba-ba, ma-ma-ma.Source: AAP · Milestones: 4 to 7 Months
- Your baby may be starting to respond to their own name.Source: AAP · Milestones: 4 to 7 Months
- Your baby may be grabbing whole-hand and practising rolling.Source: AAP · Movement: 4 to 7 Months
What does a baby need at this stage?
Milk is still the whole meal until about 6 months
WHO recommends exclusive breastfeeding for the first 6 months — no other food or drink, not even water.
What to do: Keep feeding responsively, as often as your baby wants.
Source: WHO · Infant and young child feedingFloor time earns the rolls
By around 7 months most babies roll both ways, and sitting without leaning on their arms follows.
What to do: Clear a safe patch of floor and let them work — supervised, on a firm flat surface.
Source: AAP · Movement: 4 to 7 MonthsReflux fades from here
It usually starts before 8 weeks and settles on its own by the first birthday.
What to do: Keep feeds smaller and more frequent if spit-up is heavy, and keep sleep flat on the back.
Source: NHS · Reflux in babiesFollow the cues, not the clock
Rooting, hands to the mouth and lip smacking are the early signs. Crying is a late one.
What to do: Offer a feed at the first cue rather than waiting for the cry.
Source: AAP · How Often and How Much Should Your Baby Eat?Things worth knowing at 3 months
- By 4 months your baby is much better at seeing colours — and the shades between them.Source: AAP · Infant Vision Development
- Babies of 4–12 months do best on 12–16 hours of sleep in 24, naps included.Source: AAP · How Many Hours of Sleep?
- Grabbing starts whole-hand, like a mitten — the neat finger-and-thumb grip arrives around 9 months.Source: AAP · Movement: 4 to 7 Months
- Rolling practice is underway — by around 7 months most babies can roll both directions.Source: AAP · Movement: 4 to 7 Months
- Between 4 and 7 months some of the most important changes happen quietly — senses and movement start working as a team.Source: AAP · Milestones: 4 to 7 Months
- Babbled chains — ba-ba-ba, ma-ma-ma — are real language practice. Answer back!Source: AAP · Milestones: 4 to 7 Months
- Your baby is learning their own name — watch for the head turn when you say it.Source: AAP · Milestones: 4 to 7 Months
- Your tone speaks before your words — babies this age tell emotions apart by how you sound.Source: AAP · Milestones: 4 to 7 Months
- Following moving things keeps sharpening — a slowly rolling ball is prime entertainment.Source: AAP · Milestones: 4 to 7 Months
When should I call a doctor?
Some signs mean call the same day whatever the stage — a rectal temperature of 38.0 °C (100.4 °F) or higher under three months, fewer wet nappies with a dry mouth, or a baby who is unusually hard to wake. The full list, with thresholds and sources.
Before this: 6-Week-Old Baby: What to Expect. Next: 5-Month-Old Baby: What to Expect.
This is general information, not a substitute for your own doctor, midwife or health visitor — they know your baby, and this page does not.
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