Developmental Regression
When to worry about regression at 6–9 months
True developmental regression — losing skills a baby had clearly gained — is uncommon at 6–9 months, but any genuine, sustained loss of babbling, eye contact, smiling, reaching or sitting deserves a prompt clinician review rather than watchful waiting. Brief plateaus while learning a new skill, or quietness when unwell or teething, are usually not regression.
If your baby once babbled, reached or smiled at you and now seems to have stopped, your noticing matters — and it deserves prompt attention.
In short
At 6–9 months, true developmental regression — losing skills your baby had clearly gained — is uncommon, and any genuine loss of established skills is always worth checking promptly rather than waiting. Most wobbles at this age are not regression: babies sometimes seem to "pause" one skill while pouring energy into another, or go quiet when unwell, teething or overtired. But a real, sustained loss of babbling, eye contact, smiling, reaching or sitting that your baby had managed is a reason to see a clinician soon — never to wait it out.What is normal — and what is a flag at this age
By 6–9 months babies are usually babbling, turning to your voice, smiling back, reaching for toys, passing objects between hands and beginning to sit. A short "plateau" while a baby concentrates on a new skill is normal and not the same as losing one. Watch — and check sooner — if you notice your baby:- Goes quiet — babbling or cooing that clearly fades or stops.
- Turns away — less eye contact, smiling or response to your face and voice than before.
- Loses physical skills — reaching, sitting steadiness or hand use they had gained now slipping.
- Becomes floppy or stiff — a clear change in muscle tone or movement.
A single off day is not regression. A real loss is a skill that was reliably there and is now consistently gone over days to weeks. Because some causes of regression are medical, this age group is reviewed promptly by a clinician — not watched at home indefinitely.
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 description. Our clinicians first look for any cause behind a loss of skills, build your baby's own developmental baseline, and shape gentle support around their strengths. If early communication is the worry, our speech therapy team can guide you. The goal is clarity and a clear way forward — not a label.Trusted sources
WHO healthy-development guidance; American Academy of Pediatrics developmental surveillance; CDC developmental milestones and "Learn the Signs, Act Early" resources.Next step — Trust what you've seen. Book a developmental check with a Pinnacle clinician so any real loss of skills in your baby is reviewed promptly.
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care.
What to watch
Check sooner if your baby clearly loses skills they had — babbling that stops, less eye contact or smiling, no longer reaching or sitting steadily, or a change to floppy or stiff movement that lasts beyond a passing off day.
Try this at home
Each week, note a few skills your baby uses well — a favourite babble sound, a reach for a toy, sitting steadily. If any quietly disappear over the next weeks, you'll have a clear record to share with a clinician.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10
This is general information, not a diagnosis. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care.
Frequently asked
Is it normal for my 6–9 month old to seem to 'pause' a skill?
Yes — babies often pour energy into one new skill while another seems to stand still for a while. That short plateau is normal and is not the same as losing a skill your baby had reliably gained. A true loss is a skill that was clearly there and is now consistently gone over days to weeks.
Could teething or illness explain my baby going quiet?
Often, yes. Babies frequently become quieter, fussier or less interested when teething, unwell, overtired or unsettled, and usually bounce back as they recover. If quietness or loss of skills persists once your baby is well, have it checked by a clinician promptly.
Should I wait and see, or get it checked now?
If you have seen a genuine, sustained loss of a skill your baby had — babbling, eye contact, smiling, reaching or sitting — see a clinician soon rather than waiting. Some causes of regression are medical, so this age group is reviewed promptly, not watched at home indefinitely.