The second half of the first year is when the dramatic changes of early infancy become visible and undeniable — the baby who was placed somewhere and stayed there is now on the move; the baby who responded to stimulation is now actively seeking it; the baby who was cared for is beginning, in the smallest ways, to communicate their wishes. This period, from seven to twelve months, is when the personality and interests of the individual child begin to emerge in ways that parents and caregivers can clearly see.
Tracking these milestones in Healthbooq as they happen — noting the first intentional wave, the first time a toy was looked for after it was hidden, the first clear attempt at a word — creates an accurate developmental record for routine check-ups.
Seven to Eight Months: Sitting and Exploring
By six to seven months, most babies can sit momentarily with hands on the floor for support; by eight months, the majority can sit independently — hands free, stable, able to reach and manipulate a toy without toppling. Independent sitting opens up the world considerably: the baby can now use both hands simultaneously to explore objects, banging, transferring from hand to hand, and beginning to examine things with more intention.
Object exploration at this stage is primarily oral and sensorimotor: everything is mouthed, everything is banged, everything is transferred, and anything can be thrown. The developmental purpose of this apparently simple activity is significant — the baby is building a sensory map of the physical properties of objects that forms the foundation for later understanding of the physical world.
Object permanence — the understanding that objects continue to exist when they cannot be seen — begins to develop around seven to eight months. A baby at this age will begin to search for a toy that was partially hidden in front of them, which is an early demonstration of the concept. As object permanence develops more fully, the baby will search for completely hidden objects, which typically occurs from around eight to ten months.
Eight to Ten Months: Mobility and Communication
The onset of mobility — in whatever form — typically occurs between seven and eleven months. Rolling as a form of locomotion, commando crawling (belly on the floor), traditional four-point crawling, or bottom shuffling are all normal variations. The key developmental event is the emergence of independent locomotion — the ability to move from one place to another intentionally — rather than the specific form it takes.
Communication development accelerates significantly in this period. Babbling — the repetitive consonant-vowel combinations (bababa, mamama, dadada) that begin to sound like speech — is typically well-established by eight to nine months. These babbled sounds are not yet meaningful words, but they are the precursors of them, and the baby produces them in contexts that suggest proto-intentionality: babbling at a desired object, babbling while pointing, babbling in social exchange.
Pointing begins around nine to ten months and is one of the most significant communicative developments of the entire first year. Pointing is a proto-declarative act — the baby is directing another person's attention to something of interest — which requires understanding that others have mental states (attention, interest) that can be influenced. This is the earliest foundation of theory of mind.
Waving, clapping, and simple imitation games develop around the same period and are part of the emerging social-communicative repertoire.
Eleven to Twelve Months: The Edge of Walking and Words
By twelve months, many but by no means all babies are standing independently and beginning to cruise (walking while holding furniture). Independent walking typically emerges between nine and eighteen months, with the majority achieving it between eleven and fourteen months. Babies who are not yet walking independently at twelve months are well within the normal range.
First words — or more precisely, first consistent approximations of words with apparent meaning (a consistent sound used to refer to a specific person, object, or situation) — typically emerge in the first half of the second year, with many babies producing a recognisable first word between ten and fourteen months. Consistent use of "mama" or "dada" with apparent reference to a specific parent is often cited as the first word.
At twelve months, a developmental check will typically assess: sitting, pulling to stand, purposeful manipulation of objects, babble and proto-words, pointing and gesture use, response to name, and social engagement.
When to Discuss With a Health Visitor
Signs to discuss at or before the twelve-month check: not sitting independently by nine months; not babbling (no repetitive consonant-vowel sounds) by nine to ten months; not attempting any form of communication by gesture or pointing by twelve months; not responding to their own name consistently by twelve months; loss of skills that were previously present at any point.
Key Takeaways
The second half of the first year involves some of the most dramatic visible developmental changes in the entire first decade: independent sitting, the emergence of mobility (rolling, crawling, or alternative forms of locomotion), object permanence, the first meaningful communication through gestures and proto-words, and the onset of separation anxiety. There is significant normal variation in exactly when these milestones appear — babies who crawl later are not necessarily behind babies who crawl earlier. The most important signs to discuss with a health visitor are: not sitting independently by nine months, no babble-like vocalisations by nine months, no attempt at communication (pointing, waving, showing) by twelve months.
