# Early Signs of Rett Syndrome in a 6–9-Month-Old

Canonical: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-rett-syndrome-in-a-6-to-9-month-old
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

Between 6 and 9 months, early signs of Rett Syndrome can be subtle — low muscle tone, slowing of motor milestones, reduced reaching and eye contact, the early emergence of repetitive hand movements, and a slowing in head growth. Many babies look typical at this age, so these are signals for a prompt developmental check, not a diagnosis. Only a clinician can confirm, and early support helps.

*When a baby who was reaching her milestones beautifully begins to pause or slow, a parent's careful watching is a gift — and worth sharing early with someone who can help.*

## In short
Rett Syndrome is a rare genetic neurodevelopmental condition that most often affects girls, and very early signs can be subtle. Between 6 and 9 months, many babies appear to be developing typically, so there may be little to see — but gentle clues can include a slowing of progress, reduced eye contact or social engagement, lower muscle tone (a "floppy" feel), less reaching for toys, and the very early emergence of repeated hand movements. These are signals to share with a clinician, not a diagnosis — and early developmental review opens the door to support.

## Gentle signs to notice at 6–9 months
**Movement and tone**
- A "floppy" or low-tone feel when held, or less strength in holding her head and trunk
- Slowing or pausing in motor milestones — sitting, reaching or rolling not progressing as expected
- Less reaching for or grasping of toys than before

**Hands and behaviour**
- Early hand movements that look repetitive — wringing, mouthing or rubbing — or reduced purposeful use of the hands
- Less interest in exploring objects with the hands

**Connection and growth**
- Reduced eye contact, social smiling or back-and-forth engagement
- Head growth that begins to slow over successive check-ups (deceleration of head circumference)
- A general sense that progress has plateaued after an earlier healthy start

## Why a prompt check matters
Rett Syndrome is uncommon, and at 6–9 months its signs are often quiet — a slowing rather than a dramatic change. Many of these signals overlap with ordinary variation in development, which is exactly why a clinician's eye matters: they can track head growth, tone and milestones over time and arrange the right investigations. Because Rett has a genetic basis (most commonly linked to the MECP2 gene), confirmation involves medical and genetic assessment, not a checklist. Sharing your observations early is careful, reassuring practice — and the sooner gentle support begins, the better.

## The Pinnacle way
A clinical [AbilityScore®](/ask/what-is-the-abilityscore-and-how-is-it-calculated) and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care — never from an online list or a worried evening of searching. Our team looks at the whole baby across movement, hand use, communication and growth, and works alongside your paediatrician for any medical or genetic referral. Learn more about [Rett Syndrome](/rett-syndrome) and how early [occupational therapy](https://www.pinnacleblooms.org/best-occupational-therapy-center-india-proven-improvement-rate) can nurture your child's hand use, play and connection.

## Trusted sources
Guided by WHO developmental and Nurturing Care guidance, the American Academy of Pediatrics and HealthyChildren.org on developmental monitoring and loss or slowing of skills, and the WHO ICD-11 classification of Rett Syndrome — all paraphrased here for parents.

**Next step —** book a prompt, reassuring developmental check with our team on WhatsApp: +91 91001 81181, and let's understand your baby together.

## Sources
- WHO ICD-11: Rett Syndrome (LD90.0): https://icd.who.int/
- AAP HealthyChildren.org — developmental monitoring: https://www.healthychildren.org/
- WHO — early childhood development guidance: https://www.who.int/

## Connected topics and perspectives
- Conditions: https://pinnacleblooms.org/ask/conditions
- Parent: https://pinnacleblooms.org/ask/lens/stakeholder/parent
- Infant-6-9: https://pinnacleblooms.org/ask/lens/age/infant-6-9
- Context: https://pinnacleblooms.org/ask/lens/domain/context
- Early Signs: https://pinnacleblooms.org/ask/lens/intent/early_signs
- Screen: https://pinnacleblooms.org/ask/lens/lifecycle/screen
- Special Education: https://pinnacleblooms.org/ask/lens/route/special-education
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

### Understand the subject
- How Rett Syndrome Affects a Child's Daily Life: https://pinnacleblooms.org/ask/how-does-rett-syndrome-affect-a-child-s-daily-life
- Is Rett Syndrome considered a disability?: https://pinnacleblooms.org/ask/is-rett-syndrome-considered-a-disability
- Is Rett Syndrome Genetic or Hereditary?: https://pinnacleblooms.org/ask/is-rett-syndrome-genetic-or-hereditary
- What are common myths about Rett Syndrome?: https://pinnacleblooms.org/ask/what-are-common-myths-about-rett-syndrome
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- What causes Rett syndrome in children?: https://pinnacleblooms.org/ask/what-causes-rett-syndrome-in-children
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- What is Rett Syndrome, and what does it look like in early childhood?: https://pinnacleblooms.org/ask/what-is-rett-syndrome-and-what-does-it-look-like-in-early-childhood
- Conditions That Occur Alongside Rett Syndrome: https://pinnacleblooms.org/ask/what-other-conditions-often-occur-alongside-rett-syndrome
- Early Intervention Outcomes in Rett Syndrome (Under 7): https://pinnacleblooms.org/ask/what-does-current-research-show-about-early-intervention-outcomes-for-rett-syndrome-in-children-under-7
- What is Rett Syndrome, and its ICD-11 features in early childhood?: https://pinnacleblooms.org/ask/what-is-rett-syndrome-and-what-are-its-icd-11-features-in-early-childhood
- ICD-11 Classification of Rett Syndrome (LD90.0): https://pinnacleblooms.org/ask/what-is-the-icd-11-classification-for-rett-syndrome

### Recognise signs & concerns
- Early Signs of Rett Syndrome in a 3-to-6-Month-Old: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-rett-syndrome-in-a-3-to-6-month-old
- Early Signs of Rett Syndrome in a 9-to-12-Month-Old: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-rett-syndrome-in-a-9-to-12-month-old
- Early Signs of Rett Syndrome in Young Children: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-rett-syndrome-in-young-children
- Early Signs of Rett Syndrome: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-rett-syndrome
- When to worry about Rett syndrome at 6–9 months: https://pinnacleblooms.org/ask/when-should-i-worry-that-my-6-to-9-month-old-might-have-rett-syndrome
- Early Signs of Rett Syndrome in a 1-Year-Old Girl: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-rett-syndrome-in-a-1-year-old-girl
- Can Rett Syndrome Be Cured?: https://pinnacleblooms.org/ask/can-rett-syndrome-be-cured
- Can Rett Syndrome Be Prevented?: https://pinnacleblooms.org/ask/can-rett-syndrome-be-prevented
- Rett Syndrome in Boys: https://pinnacleblooms.org/ask/do-boys-show-rett-syndrome-differently
- Do girls show Rett Syndrome differently?: https://pinnacleblooms.org/ask/do-girls-show-rett-syndrome-differently
- Should I be worried my child might have Rett Syndrome?: https://pinnacleblooms.org/ask/should-i-be-worried-my-child-might-have-rett-syndrome
- Early signs of Rett syndrome in a 1-year-old boy: https://pinnacleblooms.org/ask/what-are-the-early-signs-of-rett-syndrome-in-a-1-year-old-boy

### Explore causes & influences
- Are boys more likely to have Rett Syndrome?: https://pinnacleblooms.org/ask/are-boys-more-likely-to-have-rett-syndrome
- Are girls more likely to have Rett Syndrome?: https://pinnacleblooms.org/ask/are-girls-more-likely-to-have-rett-syndrome
- What Causes Rett Syndrome in Young Children?: https://pinnacleblooms.org/ask/what-causes-rett-syndrome-in-young-children
- Early Intervention for Rett Syndrome, UNCRPD & the SDGs: https://pinnacleblooms.org/ask/how-does-early-intervention-for-rett-syndrome-advance-un-child-rights-uncrpd-and-the-sdgs
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- Cost-effectiveness of early therapy for Rett Syndrome in young children: https://pinnacleblooms.org/ask/what-is-the-cost-effectiveness-of-early-therapy-for-rett-syndrome-in-young-children
- Prevalence and Public-Health Burden of Rett Syndrome in India: https://pinnacleblooms.org/ask/what-is-the-prevalence-and-public-health-burden-of-rett-syndrome-among-young-children-in-india

### Understand assessment
- How AbilityScore Tracks Progress in a Child with Rett Syndrome: https://pinnacleblooms.org/ask/how-does-abilityscore-track-progress-in-a-child-with-rett-syndrome
- How Rett Syndrome Is Assessed in a Young Child: https://pinnacleblooms.org/ask/how-is-rett-syndrome-assessed-in-a-young-child
- How Rett Syndrome Is Assessed in Children Under 7: https://pinnacleblooms.org/ask/how-is-rett-syndrome-assessed-in-children-under-7
- What an AbilityScore® of 0–100 means for a child with Rett Syndrome: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-0-100-mean-for-a-child-with-rett-syndrome
- What does an AbilityScore of 100–200 mean for a child with Rett Syndrome?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-100-200-mean-for-a-child-with-rett-syndrome
- What does an AbilityScore of 200–300 mean for a child with Rett Syndrome?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-200-300-mean-for-a-child-with-rett-syndrome
- AbilityScore 300–400 in Rett Syndrome: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-300-400-mean-for-a-child-with-rett-syndrome
- What an AbilityScore of 400–500 Means in Rett Syndrome: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-400-500-mean-for-a-child-with-rett-syndrome
- What does an AbilityScore of 500–600 mean for a child with Rett Syndrome?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-500-600-mean-for-a-child-with-rett-syndrome
- What does an AbilityScore of 600–700 mean for a child with Rett Syndrome?: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-600-700-mean-for-a-child-with-rett-syndrome
- What an AbilityScore of 700–800 Means for a Child with Rett Syndrome: https://pinnacleblooms.org/ask/what-does-an-abilityscore-of-700-800-mean-for-a-child-with-rett-syndrome
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### Explore therapy & support
- Can a Child with Rett Syndrome Attend a Mainstream School?: https://pinnacleblooms.org/ask/can-a-child-with-rett-syndrome-attend-a-mainstream-school
- Can a Child with Rett Syndrome Attend a Regular School?: https://pinnacleblooms.org/ask/can-a-child-with-rett-syndrome-attend-a-regular-school
- Can a Child with Rett Syndrome Live Independently?: https://pinnacleblooms.org/ask/can-a-child-with-rett-syndrome-grow-up-to-live-independently
- How is Rett Syndrome diagnosed in a child?: https://pinnacleblooms.org/ask/how-is-rett-syndrome-diagnosed-in-a-child
- How is Rett Syndrome supported through therapy?: https://pinnacleblooms.org/ask/how-is-rett-syndrome-supported-through-therapy
- Rett Syndrome AbilityScore®: What to Do Next: https://pinnacleblooms.org/ask/my-child-with-rett-syndrome-has-an-abilityscore-of-0-100-what-should-we-do-next
- Rett Syndrome with an AbilityScore of 100–200: your next step: https://pinnacleblooms.org/ask/my-child-with-rett-syndrome-has-an-abilityscore-of-100-200-what-should-we-do-next
- Rett Syndrome: AbilityScore 200–300 — what to do next: https://pinnacleblooms.org/ask/my-child-with-rett-syndrome-has-an-abilityscore-of-200-300-what-should-we-do-next
- Rett Syndrome: AbilityScore 300–400 — what to do next: https://pinnacleblooms.org/ask/my-child-with-rett-syndrome-has-an-abilityscore-of-300-400-what-should-we-do-next
- Rett Syndrome with an AbilityScore of 400–500: what to do next: https://pinnacleblooms.org/ask/my-child-with-rett-syndrome-has-an-abilityscore-of-400-500-what-should-we-do-next
- Rett Syndrome and an AbilityScore of 500–600: What To Do Next: https://pinnacleblooms.org/ask/my-child-with-rett-syndrome-has-an-abilityscore-of-500-600-what-should-we-do-next
- Rett Syndrome AbilityScore 600–700: What To Do Next: https://pinnacleblooms.org/ask/my-child-with-rett-syndrome-has-an-abilityscore-of-600-700-what-should-we-do-next

### At home & in everyday life
- How can I support my child with Rett Syndrome at home?: https://pinnacleblooms.org/ask/how-can-i-support-my-child-with-rett-syndrome-at-home