Signs of social delay in a 9-to-12-month-old

Watching how your baby reaches for you, lights up at your voice, and plays peek-a-boo — these small moments are where social connection grows.

In short

Between 9 and 12 months, most babies are busy little social beings — sharing smiles, following your gaze, copying gestures and reaching to be picked up. Gentle signs worth a developmental check include not responding to their name, little eye contact or shared smiling, no babbling or gestures like waving or pointing, and little interest in simple games like peek-a-boo. None of this is a diagnosis — it simply means a clinician's calm look is wise now, because support at this age works beautifully.

What to watch at 9–12 months

At this age, social development shows up in the back-and-forth of everyday play. Most babies will smile at familiar faces, turn when you call their name, and enjoy being part of family life. Gentle flags that deserve a clinician's eye include:

• Name response — by around 9–12 months, your baby usually turns or looks when you say their name. Consistently not responding (when hearing is fine) is worth noting.
• Eye contact and shared smiles — little back-and-forth gazing, few warm smiles in response to yours, or seeming hard to engage face-to-face.
• Gestures — not yet waving bye-bye, reaching up to be lifted, clapping or beginning to point at things of interest.
• Babbling and sounds — quiet, with little "ba-ba" or "da-da" chatter, or no attempts to copy your sounds.
• Shared joy — not showing you a toy, not following where you look or point, or little interest in games like peek-a-boo or pat-a-cake.

Remember, babies grow at their own pace and a single late skill is rarely a worry. It's a pattern of several of these together — or a parent's quiet instinct — that makes a gentle check worthwhile.

When to act

If several of these signs appear together, if your baby seems to lose a skill they once had, or if your gut says something feels different, arrange a developmental check now rather than waiting and watching alone. Trust what you see every day — it is valuable 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 observe how your baby connects, plays and communicates, and build support around joyful, everyday interaction. You can explore how our speech therapy and occupational therapy teams nurture early social and communication skills through play.

Trusted sources

CDC developmental milestones and "Learn the Signs, Act Early" resources for social-emotional skills at 9 and 12 months; American Academy of Pediatrics guidance (healthychildren.org) on early social development and developmental monitoring in infants.

Next step — Trust what you've noticed. Book a developmental assessment with a Pinnacle clinician for a calm, clear review of your baby's milestones and connection.

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.