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Signs of sensory delay in a 6-to-9-month-old
Between 6 and 9 months, babies explore through looking, listening, touching, reaching and mouthing. Seek a gentle developmental check if your baby doesn't turn to sounds, doesn't follow objects or faces with their eyes, doesn't reach for or mouth toys, is very distressed by ordinary touch, or feels unusually floppy or stiff. A hearing and vision review is often a sensible first step. None of this is a diagnosis — it means early support, which works beautifully at this age, is worth exploring now.
In this answer 5 sections
Watching how your baby looks, listens, reaches and settles is one of the loveliest ways to get to know who they are becoming.
In short
Between 6 and 9 months, most babies are busily exploring the world through their eyes, ears, hands and mouth — turning to sounds, reaching for toys and bringing everything to their lips. A gentle developmental check is wise if your baby doesn't startle or turn to sounds, doesn't follow objects or faces with their eyes, doesn't reach for or mouth toys, strongly dislikes being touched or held, or seems unusually floppy or stiff when handled. None of this is a diagnosis — it simply means a clinician's calm look is worthwhile now, because the early months are a wonderful window for support.
What to watch at 6–9 months
At this age, babies use their senses to learn — they look, listen, touch, taste and move to make sense of the world. Most sensory differences at this stage are subtle, so trust what you notice day to day. Gentle flags worth a clinician's eye include:
- Hearing & sound — not turning towards your voice or everyday sounds, not startling at loud noises, or not babbling or cooing back to you.
- Seeing & looking — not following a moving toy or face with their eyes, eyes that consistently drift or don't seem to meet yours, or not noticing things across the room.
- Touch & handling — becoming very distressed by ordinary touch, cuddling or clothing textures, or seeming not to react to touch at all.
- Hands & mouth — not reaching for, grasping or bringing toys to the mouth, which is how babies explore at this age.
- Movement & muscle tone — feeling unusually floppy (like a rag doll) or stiff when you pick them up, or not pushing up on their arms during tummy time.
The aim is not worry — it's that one calm, early observation turns small questions into early opportunities.
When to act
If your baby isn't responding to sounds or voices, isn't following with their eyes, isn't reaching for or mouthing toys, or feels notably floppy or stiff, arrange a developmental check now rather than waiting. A hearing and vision review is often a sensible first step, and your everyday observations are valuable clinical information.
The Pinnacle way
A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from an online list. Our clinicians watch how your baby looks, listens, reaches and settles, and shape gentle, play-based support around your family. Our occupational therapy team can help with sensory regulation and exploration, and you can start any time from our home page.
Trusted sources
CDC developmental milestones and "Learn the Signs, Act Early" resources for infants; American Academy of Pediatrics (healthychildren.org) guidance on sensory and developmental monitoring in the first year; WHO Nurturing Care Framework on responsive caregiving and early development.
Next step — Trust what you've noticed. Book a developmental assessment with a Pinnacle clinician for a calm, clear review of your baby's senses and milestones.
This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.
CONNECT THE ANSWER TO YOUR CHILD’S DAY
Something to notice. Something to discuss.
What to notice
Seek a check if your baby doesn't turn to or startle at sounds, doesn't follow toys or faces with their eyes, doesn't reach for or mouth toys, is very distressed by ordinary touch or cuddles, or feels unusually floppy or stiff when handled. A hearing and vision review is often a sensible first step.
In everyday life
During play, gently rattle a toy out of sight on each side and notice if your baby turns towards it; then slowly move a colourful toy across their view to see if their eyes follow. Jot down what you notice — it gives a clinician a clear, useful picture.
Bring your observations and questions to your child’s professional. Choose activities that suit your child’s comfort, abilities and agreed plan.
Bring your questions to a first visitQuestions families ask
Is it normal for my 6-month-old to put everything in their mouth?
Yes — mouthing toys and hands is exactly how babies this age explore textures and shapes. It's a healthy sign of sensory exploration, not a delay. The gentle flag is the opposite: a baby who doesn't reach for or mouth objects at all.
My baby gets upset when held or cuddled — should I worry?
Some babies are more sensitive to touch than others, and that alone isn't a diagnosis. If your baby is consistently very distressed by ordinary touch, clothing or cuddles, a calm developmental check can help you understand their sensory preferences and offer simple, soothing strategies.
How do I know if it's a hearing problem or a sensory delay?
You often can't tell from home, and that's fine — a hearing and vision review is usually a sensible first step. If your baby doesn't turn to your voice or startle at sounds, ask your clinician for a hearing check, which is quick, painless and very informative.
FOLLOW THE SOURCE
References behind this answer.
- Source referenceCDC — Learn the Signs, Act Early (infant milestones)
- Organisation website · further readingAAP — HealthyChildren.org on infant development
- Organisation website · further readingWHO Nurturing Care Framework
References are supplied with this answer. An organisation homepage offers further reading; it does not establish an independent review of this page.
Content attribution: SETU Consortium · Pinnacle Blooms Network.
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