YOUR QUESTION. A CLEARER NEXT STEP.
Should I be worried my child might have Rett Syndrome?
Worry is reasonable, but worry is not a diagnosis. Rett Syndrome (ICD-11 LD90.0) is rare and marked by a loss of skills after a normal start — most commonly loss of hand use and language between 6–18 months. A clear regression deserves prompt review; genetic testing and a clinician confirm it.
In this answer 5 sections
When your daughter's development takes an unexpected turn, the worry can be overwhelming — let's bring some calm clarity to what you're seeing.
In short
Rett Syndrome is a rare genetic condition (WHO ICD-11 LD90.0), affecting almost exclusively girls. Its hallmark is a regression — a child who developed typically in early infancy begins, usually between 6 and 18 months, to lose skills she had gained. Worry is reasonable, but worry is not a diagnosis. Most children who develop a little differently do not have Rett Syndrome, and only genetic testing and a qualified clinician can confirm or rule it out.
Signs worth attention
The pattern that matters is loss after a normal start, not slowness alone. Watch for:
- Loss of purposeful hand use — and the appearance of repetitive hand movements such as wringing, washing or mouthing
- Loss of spoken words or babble she previously had
- Slowing head growth noted on growth charts
- Changes in walking — unsteady, stiff or on tiptoes
- Loss of social engagement during the regression phase
A single delayed milestone is common and often resolves. A clear regression — going backwards — is the real flag and deserves prompt review.
The science, briefly
Most classic Rett Syndrome is linked to changes in the MECP2 gene, confirmed by a genetic test your paediatrician can arrange. Because Rett is rare and other, more common reasons for delay exist, the right first step is a careful developmental check — not panic. Early support meaningfully helps movement, communication and daily comfort.
The Pinnacle way
No diagnosis — and no clinical AbilityScore® — is ever made from an online form; both are formed only at a Pinnacle Blooms Network centre under a qualified clinician's care, who will look for other causes first and guide any genetic referral. Where support is needed, our therapy programmes build on your child's own strengths. The aim is always comfort, connection and capability.
Trusted sources
WHO ICD-11 (LD90.0); American Academy of Pediatrics and HealthyChildren.org guidance on developmental regression; ASHA on communication support.
Next step — The kindest thing to do with worry is to check. Book a developmental assessment with a Pinnacle clinician.
CONNECT THE ANSWER TO YOUR CHILD’S DAY
Something to notice. Something to discuss.
What to notice
Seek a prompt check if your child loses skills she once had — purposeful hand use, words or babble — develops repetitive hand wringing or washing movements, shows slowing head growth, or becomes less socially engaged after a period of typical development.
In everyday life
Keep a simple month-by-month note or short videos of skills your child has gained — words, gestures, hand use. If something she could do clearly disappears, that record gives your clinician the clearest, calmest picture to work from.
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 Rett Syndrome common?
No. Rett Syndrome is rare and occurs almost exclusively in girls. Most children who develop a little differently do not have it. A careful developmental check helps tell the difference calmly.
What is the single most important sign?
Regression — losing skills your child once had, rather than simply being slow to gain new ones. Loss of purposeful hand use with new repetitive hand movements, usually between 6 and 18 months, is the classic flag.
How is Rett Syndrome confirmed?
Through a genetic test, most often looking at the MECP2 gene, arranged by your paediatrician, alongside clinical assessment. It is never confirmed from an online checklist or form.
Can therapy help my child?
Yes. Whatever the final picture, early, strengths-based support for movement, communication and daily comfort can meaningfully improve quality of life. The first step is a clinician-led assessment.
FOLLOW THE SOURCE
References behind this answer.
- Source referenceWHO ICD-11 — Rett Syndrome
- Organisation website · further readingAAP HealthyChildren — developmental regression
- Organisation website · further readingASHA — communication support
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.
PEOPLE, TOPICS & DEVELOPMENT
See the connections.
Browse the wider question collections connected with this answer’s audience, developmental area and stage.
FROM UNDERSTANDING TO PURPOSEFUL SUPPORT
One question. Your child’s whole life.
Your child’s self-sufficient, mainstream-included life is the purpose from the beginning. At Pinnacle, that purpose shapes what we understand, the goals we choose, the people we bring together, everyday practice and review.
Connect this question with the right support.
Start with your child’s strengths, your observations and what you want everyday life to become.
Make the next conversation useful.
Bring the situations you notice at home or school. We’ll explain a suitable service, centre and first visit, including availability and fees, before you decide.
How PinnacleAI® connects the journeyExplore the seven stages
- 1Understand abilities
A starting picture of your child’s capabilities.
- 2Choose meaningful goals
Readiness and a plan shaped around the child.
- 3Bring the right support together
Suitable therapies and people for those goals.
- 4Carry practice into everyday life
Guidance for family, home and school.
- 5Track and correct
Use observations to adjust the plan.
- 6Reassess and review
Decide what to continue, change or do next.
- 7Grow independence and participation
The child’s life gives each step its purpose.
Explore the whole PinnacleAI® system → · Participation at school and in the community →
PINNACLE’S EVIDENCE, OPEN TO YOU
Look at the evidence behind our work.
Read our research, inspect the original regulatory documents and check what each institutional measure means.
General information supports a conversation with an appropriately qualified professional. Advice, goals and support depend on the individual child.