A newborn arrives with a small kit of reflexes and blurry vision out to about thirty centimetres. Six months later you have a baby who laughs at peekaboo, rolls across the rug, and reaches for your coffee with worrying accuracy. Most of that change is invisible — about a million new synapses per second in the first year — but the visible markers are useful, both for celebrating and for spotting the rare cases where a baby needs more help. Healthbooq keeps a running record of milestones that comes in handy at the eight-week, four-month and six-month health visitor checks.
Birth to Two Months
Newborn babies do a lot more than they look like they are doing. The reflexes are the obvious bit: rooting (turning toward a touch on the cheek), sucking, the Moro startle (arms fly out when they feel a drop), the palmar grasp (closing a fist around your finger). All of these are checked at the newborn examination on day one. They are present from birth and most fade between two and six months as voluntary movement takes over.
Vision is the laggard. A newborn sees clearly at about 20–30cm — exactly the distance from the breast or bottle to your face — and prefers high-contrast patterns and faces over anything else. Colour vision sharpens through the first three months. Hearing is much further along: babies recognise their mother's voice from the first day and will turn toward familiar voices heard during pregnancy.
The reflexive smiles you see in the first weeks (often during sleep, often after a feed) are not social. The first real smile — eye contact, in response to your face or voice — usually arrives between five and eight weeks. If a baby is consistently not making eye contact or smiling socially by ten weeks, mention it at the next check.
Two to Four Months
This is when babies become genuinely fun. Sustained eye contact stretches from a few seconds to a long, locked gaze. Cooing — open vowel sounds, "ooh" and "aah" — appears around two months and turns into something like a conversation: you talk, they coo, you talk again. That turn-taking is the structural backbone of language; it shows up before any words.
Head control catches up fast. At two months, held upright, the head still flops; by four months, most babies can hold it steady and look around. Tummy time is what gets them there — five minutes a few times a day from the first weeks, building to twenty or thirty minutes by three months. Babies who do tummy time roll, sit and crawl earlier, and the back of the head stays nicely rounded rather than developing a flat spot.
Around three months babies discover their hands. They will lie on their back staring at their own fingers with deep concentration. This is not boring — it is the moment they realise the hand belongs to them and can be moved on purpose. Reaching follows shortly afterwards.
Four to Six Months
Reaching becomes deliberate around four to five months. Early efforts are wide and inaccurate; within a few weeks the swipes turn into grabs. Once an object is in the hand, it goes straight to the mouth. The mouth is a more sensitive instrument than the fingers at this age — babies map objects by mouthing them. This is why baby-led weaning (around six months, when sitting is steady) feels so natural to them.
Rolling tends to arrive between four and six months. Most babies roll front-to-back first because the abdominal push is easier than the harder back-to-front roll, which needs more core strength. The day after the first roll is the day the changing table stops being safe to leave a baby on unattended, even for a moment.
Babbling — repeated consonant-vowel combinations like "ba-ba", "da-da", "ma-ma" — starts around four to five months. The sounds at this stage cover phonemes from many languages, including ones the baby is not hearing. Over the next six months the repertoire narrows down to the sounds of the languages they actually hear. Babies in bilingual households babble in both sound systems and do not get confused.
What Genuinely Helps Development
The research on infant development is unusually clear about what works. Talking to your baby — not in baby talk, in normal sentences narrating what is happening — is the single most powerful predictor of language development at age three. Reading aloud from birth has the same effect; the baby is not following the plot, they are absorbing rhythm and prosody. A 2017 MIT study found that conversational turn-taking (you say something, they vocalise, you respond) builds language circuits more than sheer word count does.
Tummy time, awake and supervised, from day one. Floor play on a mat rather than long stretches in bouncers, swings or car seats — flat surfaces let babies discover their bodies. Skin-to-skin contact, especially in the first weeks, regulates heart rate, breathing and temperature, and is associated with better breastfeeding outcomes. Responsive caregiving — picking up when they cry, feeding when hungry, comforting when distressed — does not "spoil" babies under six months; it builds the secure attachment that everything else rests on.
When to Ask the Health Visitor
Most variation in milestones is normal. Some babies roll at four months; some at seven. Both are fine. The flags worth raising are persistent rather than late: by six months, no social smile at all, no response to loud sounds, no attempt to reach for objects, no head control when pulled to sitting, or no babbling. A baby who was meeting milestones and has lost a skill (stopped babbling, stopped eye contact) is also worth a same-week appointment. Most concerns turn out to be nothing; the small percentage that need early support do better the sooner they get it.
Key Takeaways
The first six months are when a baby's brain forms about a million new neural connections per second. The headline milestones: a real social smile around six weeks, steady head control by four months, deliberate reaching by five months, rolling between four and six months, and babbling that starts to sound like proto-words by five months.
