The second half of the first year is when the personality you suspected was in there starts showing up clearly. The baby who used to stay where you put them is now rolling across the room. The baby who responded to stimulation is now hunting for it. The baby who was cared for is starting, in tiny ways, to communicate what they want.
What follows is the developmental shape of months 7 to 12 — what to expect, what variation is normal, and what is worth flagging.
Logging first sit, first crawl (or first commando shuffle), first wave, first time they searched for a toy that disappeared, first clear attempt at a word in Healthbooq gives you an accurate record for the 9-month and 12-month checks.
7 to 8 Months: Sitting and Exploring
By 6 to 7 months most babies can sit briefly with hands forward on the floor for support. By 8 months the majority sit independently — hands free, stable, able to reach and grab a toy without toppling. Independent sitting changes the world. Both hands are now free at the same time. Your baby can bang two objects together, transfer a toy hand to hand, study something with intent.
Object exploration at this stage is sensorimotor — meaning they explore by mouthing, banging, transferring, dropping, and throwing. Everything goes in the mouth. It looks chaotic. It is also exactly how a baby builds an internal map of how the physical world behaves: this is hard, this is soft, this makes a noise when I bang it, this fits inside that one.
Object permanence — understanding that things exist when you cannot see them — starts to come in around 7–8 months. A baby this age will start searching for a toy partially hidden in front of them. By 8–10 months they search for fully hidden objects. This cognitive shift is also why separation anxiety often turns up around the same time: your baby now understands that you continue to exist when you leave the room, which makes leaving a bigger deal than it was before.
8 to 10 Months: Mobility and First Gestures
Mobility arrives in this window, in whatever form your baby invents. Possibilities:
- Classic four-point crawling
- Commando crawling (belly on the floor, pulling with arms)
- Bottom shuffling (sitting up and hitching forward)
- Rolling as a transport method
- Skipping crawling entirely and going straight to pulling up
All of these are normal. The milestone is independent locomotion — being able to move where they want to go on purpose — not the specific method. Babies who never crawl in the textbook way are not delayed. (The historical assumption that crawling was developmentally important for later coordination is not well-supported by the research.)
Babbling is well-established by 8–9 months — repetitive consonant-vowel chains like "bababa," "mamama," "dadada." These are not yet words but the speech motor system is rehearsing them. You will hear your baby babble at a thing they want, babble while they point, babble during back-and-forth play. This is proto-intentional communication.
Pointing usually emerges around 9 to 10 months and is one of the most significant communicative milestones of the entire first year. When your baby points at something to draw your attention to it, they are showing that they understand you have a mind, that your attention is something they can direct, that there is a "shared world" between you. This is the foundation of theory of mind. The absence of pointing by 12 months is one of the more reliable early markers worth raising with a clinician.
Waving, clapping, and copying also come in around this period. Wave at them, they wave back. Clap your hands, they clap. The imitation is not just cute — it is the engine that will drive language acquisition over the next year.
11 to 12 Months: The Edge of Walking and First Words
By 12 months many babies are pulling to stand and cruising — walking sideways while holding furniture. Some are taking independent steps. Independent walking has a wide normal range — most sources cite 9 to 18 months. The WHO Multicentre Growth Reference Study tracked this across thousands of babies in six countries: 50% walking by 12 months, 90% by 14 months, but normal extends to 18 months. A baby who is not walking at 12 months is not delayed.
First words are often heard between 10 and 14 months. The technical definition: a sound used consistently to refer to a specific person, object, or situation. "Mama" used reliably for one specific parent (and not for everything else) counts. "Baba" used consistently for a bottle counts. The babbled "mamama" of an 8-month-old does not yet qualify because it is not yet referential.
What a 12-month review typically looks at:
- Sits independently
- Pulls to stand; cruises along furniture
- Picks up small objects with thumb and finger (pincer grip)
- Puts objects into and takes them out of a container
- Babbles with varied sounds; may have a recognisable word or two
- Points to things they want or want you to look at
- Waves; plays simple games like peekaboo
- Responds to their own name
- Engages socially — eye contact, shared attention, turn-taking
When to Talk to Your GP or Health Visitor
The thresholds below are worth raising at or before the 12-month check:
- Not sitting independently by 9 months
- No babbling (no repetitive consonant-vowel sounds) by 9–10 months
- No pointing, waving, or any deliberate gesture by 12 months
- Not responding to their own name by 12 months
- No interest in interactive games (peekaboo, give-and-take)
- Not bearing weight on legs when supported in standing by 12 months
- Persistent body asymmetry — one side consistently doing less than the other
- Loss of any skill previously present at any age
Loss of a skill — regression — is the one to flag fastest, regardless of age. A baby who was babbling and stops, who was making eye contact and stops, who was waving and now does not, should be seen.
Key Takeaways
Months 7–12 bring some of the most visible change of the entire first year: independent sitting, mobility (in whatever form — crawling, rolling, bottom shuffling), object permanence, separation anxiety, the first deliberate gestures (pointing, waving), and often a recognisable first word. Range matters — babies who walk at 9 months and babies who walk at 17 months are both fine. Talk to your GP or health visitor about: not sitting independently by 9 months, no babbling by 9–10 months, no pointing or waving by 12 months, not responding to their own name by 12 months, or any loss of a previously present skill.
