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Signs of Communication Delay in a 3-to-6-Month-Old
Between 3 and 6 months, communication appears as cooing, social smiling, turning towards sound and watching faces — not words. Seek a developmental check if your baby rarely makes sounds, doesn't smile back, doesn't respond to voices or sound, or makes little eye contact by around 6 months. A hearing screen is often a reassuring first step. None of this is a diagnosis — it means early, gentle review is wise, because support works best now.
In this answer 5 sections
At three to six months, your baby is just beginning their conversation with the world — coos, gazes and gurgles are the first words of a language all their own.
In short
Between 3 and 6 months, communication shows up as cooing, smiling back at you, turning towards voices and watching faces — not in words yet. Gentle reasons to seek a developmental check include a baby who rarely makes sounds, doesn't smile socially, doesn't turn towards voices or sounds, or makes little eye contact by around 6 months. None of this is a diagnosis — it simply means a clinician's warm, early look is wise, because support at this age works beautifully.
What's typical at 3–6 months
This is the pre-speech stage, where babies practise the rhythm of conversation long before words. By around 6 months, most babies will:
- Coo and babble — vowel sounds ("ahh", "ooh"), then chains like "ba-ba", and squeals or chuckles.
- Smile and respond socially — beaming back when you smile or talk to them.
- Turn towards sound — looking for your voice, a rattle or a familiar noise.
- Take turns — "answering" your sounds with their own, a back-and-forth that feels like chatting.
- Watch faces and make eye contact — gazing at your mouth and eyes as you speak.
Gentle flags worth a clinician's eye
These are reasons to ask early — not signs of a diagnosis:
- Very few or no sounds — little cooing or babbling by around 6 months.
- No social smile — not smiling back at familiar faces.
- Not responding to sound — doesn't startle, quieten or turn towards your voice (this also deserves a hearing check).
- Little eye contact or shared gaze — rarely looking at faces during play and feeds.
- Loss of a skill — sounds or smiles that were there and then faded.
A simple hearing screen is often the first, reassuring step, since clear hearing underpins early communication.
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 connects, listens and sounds out the world, and shape playful support around your everyday moments. You can explore our speech therapy for early communication and start with a simple developmental check.
Trusted sources
CDC "Learn the Signs, Act Early" milestones for babies; American Academy of Pediatrics guidance (healthychildren.org) on early communication and developmental monitoring; ASHA resources on infant pre-speech and hearing.
Next step — Trust what you notice each day. Book a gentle developmental check with a Pinnacle clinician for a calm, clear look at your baby's early communication.
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 developmental check if by around 6 months your baby rarely coos or babbles, doesn't smile back socially, doesn't turn towards or quieten at sounds and voices, makes little eye contact, or has lost sounds or smiles once present. Limited response to sound also warrants a hearing screen.
In everyday life
Have face-to-face 'chats' during feeds and nappy changes — coo, pause, and wait for your baby to 'answer'. Notice whether they look at your face, take turns with sounds, and turn towards your voice; these small moments are valuable clues for a clinician.
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
Should my 4-month-old be making words yet?
No — words come much later. At this age communication is about cooing, smiling, taking turns with sounds and turning towards your voice. These are the building blocks that come long before first words.
My baby isn't babbling much yet — is that a problem?
Babbling chains like 'ba-ba' often emerge closer to 6 months, so there's a normal range. If by around 6 months there are very few sounds, little social smiling or limited response to your voice, a gentle developmental check and hearing screen are wise.
Could a hearing problem affect my baby's communication?
Yes — clear hearing underpins early communication. If your baby doesn't startle, quieten or turn towards sounds, a simple hearing screen is a reassuring and important first step.
FOLLOW THE SOURCE
References behind this answer.
- Source referenceCDC — Milestones at 4 months
- Organisation website · further readingAAP — HealthyChildren: infant development
- Organisation website · further readingASHA — Early communication development
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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