Milestone checklists cause enormous anxiety in new parents, and this is largely because they are often presented in ways that suggest all babies should hit each milestone at exactly the stated month. They should not, and they do not.
Developmental milestones are best understood as windows — typically spanning several months — rather than fixed dates. The "average" age at which babies reach a milestone tells you something about the population at large, but says almost nothing about any individual baby. A baby who sits independently at five and a half months and a baby who first does so at eight months are both entirely within the range of normal. The former is simply earlier; the latter is simply later.
The purpose of milestone monitoring is to identify clear developmental delays early, so that support can be offered sooner rather than later. It is not to create a league table of infant achievement. Please read the following with that in mind.
Motor: Reflexive movements dominate at this stage — the rooting reflex (turning towards a touch on the cheek), the sucking reflex, the grasp reflex (fingers curl around anything placed in the palm), and the Moro reflex (startle response). These are not voluntary — they are hardwired.
Vision: Newborns can focus at approximately 20–30cm — roughly the distance from your face to theirs during feeding. Black and white contrasting patterns are most visible at this age; colour vision develops over the first months.
Social: Brief periods of eye contact during feeds. Babies at this stage are already beginning to prefer the human face over other visual stimuli.
What's normal variation: Ranges in alertness, feeding frequency, sleep patterns, and responsiveness are all very wide in the first month. The newborn period is not developmentally predictable in the way later months are.
Motor: Head control improving — when placed on their tummy, babies can lift the head briefly. Hands are starting to unfurl from the newborn fist position; there may be brief moments of batting at objects.
Social: The social smile — genuinely responsive to a face or voice — typically emerges between six and ten weeks. This is distinct from the reflexive newborn smile. When it appears, it is unmistakeable and one of the most rewarding moments of early parenthood.
Communication: Cooing and early vocalisation. Babies are beginning to communicate with sounds and will often engage in "conversation" — making sounds, pausing, then responding to your response.
Vision: Tracking moving objects. The ability to follow a moving face or toy with the eyes develops rapidly.
What to mention to your health visitor if not present by three months: No social smile, no vocalisation, no head control when held upright.
Motor: Much better head control — the majority of babies have a fairly steady head by around four months. Tummy time becomes more productive as the baby can lift head and chest. Reaching for objects, though without reliable accuracy. Rolling from front to back, sometimes, occasionally.
Social: Responses to familiar faces and voices are clear and enthusiastic. Babies begin to distinguish familiar people from strangers. Laughing typically emerges around four months.
Communication: More varied vocalisation — different sounds for different states. The beginnings of consonant sounds (ba, ma, da) may appear.
Hands and mouth: Everything goes to the mouth. This is developmental and sensory — the mouth provides the richest sensory information at this age.
Motor: Sitting with support (and moving towards sitting without support — most babies achieve this between six and eight months). Rolling both ways. Reaching with accuracy. May begin to bear weight through the legs when held standing.
Social: Strong stranger anxiety begins to develop in many babies. Clear preference for primary caregivers.
Communication: Babbling with repetitive syllable sounds (bababa, dadada). Responding to their own name.
Feeding: Developmentally ready for solid foods. Tongue-thrust reflex diminishing, good head control, shows interest in food. This is also when the pincer grip begins to develop.
What to mention if not present by six months: No babbling, not reaching for objects, poor head control.
Motor: Sitting independently — most babies achieve this between six and nine months. Pivoting on the tummy. The beginnings of crawling (though some babies skip crawling entirely and move straight to cruising or walking — this is normal).
Social: Separation anxiety may intensify. Responding to facial expressions — if you look concerned, the baby will often look concerned too (social referencing).
Communication: More complex babbling with varying intonation. Beginning to gesture — raising arms to be picked up.
Cognitive: Object permanence is developing — the understanding that objects continue to exist when not visible. This is why peekaboo becomes suddenly compelling.
Motor: Pulling to stand using furniture. Cruising (walking while holding onto furniture). The pincer grip — picking up small objects between thumb and forefinger — is becoming more refined.
Social: Very clear attachment behaviours. Strong preference for known caregivers. Waves bye-bye. Looks where you point.
Communication: Mama and dada used with some intentionality (though not always with specificity — bababa and dadada may precede meaningful use). Understands several familiar words.
Cognitive: Imitating simple actions (clapping, banging). Beginning to understand cause and effect.
Motor: Most babies are cruising confidently, and a substantial minority are walking. The first independent steps typically occur anywhere between nine and sixteen months — the wide range is normal and the later end is not a cause for concern. Fine motor skills continue to refine.
Social: Pointing to share interest (proto-declarative pointing) — "look at that thing" — as distinct from pointing to request something. This is a significant milestone.
Communication: First clear words in context — typically between ten and fourteen months. A word counts as a word when it is used consistently to refer to the same thing. "Mama" said consistently when seeing the mother is a word. Some babies have six to ten words by twelve months; others have one or two, or none at the first birthday, and catch up rapidly over the following months.
What to mention at twelve months if not present: No babbling, no pointing (either proto-declarative or proto-imperative), no waving or clapping, no words at all by fourteen months.
For babies born before 37 weeks, use their corrected age (age from due date, not birth date) rather than chronological age when assessing milestones. A baby born eight weeks early at eight months old has a corrected age of six months, and their development should be assessed against that baseline. Most professionals use corrected age until the child is two years old.
If you have concerns about your baby's development at any point, speak to your health visitor. They are trained to assess development and to make appropriate referrals. The UK developmental review schedule includes checks at six to eight weeks, eight months, and around two to two-and-a-half years — but you do not need to wait for these scheduled checks to raise a concern.
Early intervention makes a significant and evidence-supported difference to developmental outcomes across a range of conditions. There is never a wrong time to ask.
Development is not a competition, and the first year is not an exam. Babies develop at different rates in different areas — a baby who is exceptionally verbal may be a late walker; an early walker may take longer to develop language. These are differences in developmental pattern, not problems. Love, responsiveness, eye contact, conversation, play, and feeding matter far more to developmental outcomes than reaching any specific milestone at any specific month.
Use the TinyYears app to journal every precious moment — photos, voice notes, videos and more.
Tracking your baby's development doesn't have to be stressful. Here's how to stay informed, spot patterns, and enjoy the journey without spiralling into comparison.
You don't need a professional camera to take beautiful photos of your baby. Here are practical tips for capturing the moments that matter, on any phone.
Comparing NHS and NCT antenatal classes, hypnobirthing, online vs in-person options, when to book, and what questions are worth raising in class.