Three-month-olds are pure delight. Head control is much stronger, hands have been discovered (and pulled straight into the mouth), and many babies now sleep a five-to-six-hour stretch at night. Welcome to the smiley, chatty, still-fits-in-your-arms sweet spot.
3 months old developmental milestones
- Holds head steady when carried upright
- Bats at hanging toys and brings hands to midline
- Coos, gurgles, and takes turns "chatting" with you
- Follows objects from one side to the other with the eyes
- A longer 5-6 hour night stretch is common (but not guaranteed)
Care tips for 3 months old
- Introduce a playmat with an overhead arch — batting at dangling toys builds early reaching skills.
- Set a simple bedtime routine — bath, feed, story, dim room — to reinforce day-night rhythm.
- Sing the same lullaby every night. Repetition helps baby predict sleep.
- Book any postnatal check for yourself if you haven’t already.
This month's checklist
- Attend the 3-month check-up
- Move baby to a bigger cot if outgrowing the bassinet
- Photograph the 3-month milestone card
Frequently asked questions
What are the developmental milestones at 3 months?
Head control, bringing hands together, cooing conversations, a strong social smile, and tracking objects across the visual field.
Is sleep regression normal at 3 months?
Some babies hit a mild disruption around 12-14 weeks as sleep cycles mature. Keep the routine steady and it usually settles within two weeks.
Should my 3-month-old be rolling?
Rolling typically starts between 4 and 6 months. Some early movers roll at 3 months — always supervise during tummy time and never leave baby on a raised surface.
When to call your paediatrician
Most months of babyhood pass without alarm, but a small set of symptoms always deserves urgent review. Contact your paediatrician or the nearest paediatric emergency room straight away for any of the following:
- Fever above 39 °C, or any fever lasting more than 72 hours
- Refusing more than two feeds in a row, or fewer wet nappies than usual
- Breathing that is fast, noisy, or with visible chest tugging
- Persistent vomiting, blood in stool, or a swollen belly
- Any sudden loss of a skill baby had already learned
Where the 3 months old stage fits in
The first six months are all about building trust, feeding rhythms, and the neurological wiring that underpins every future skill. Growth is at its fastest — most babies gain 150-200 g per week early on and double their birth weight by six months. Your voice, your smell, and skin-to-skin contact are the most powerful tools you have.
Educational content — not a substitute for medical care. Contact your paediatrician urgently for high fever in a young infant, refusing feeds, laboured breathing, persistent vomiting, or any concern that feels wrong to you.