{"h1":"Should I be worried my child might have Rett Syndrome?","faq":[{"a":"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.","q":"Is Rett Syndrome common?"},{"a":"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.","q":"What is the single most important sign?"},{"a":"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.","q":"How is Rett Syndrome confirmed?"},{"a":"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.","q":"Can therapy help my child?"}],"lang":"en","slug":"should-i-be-worried-my-child-might-have-rett-syndrome","title":"Should I be worried my child might have Rett Syndrome?","entity":{"key":"rett","kind":"condition","name":"Rett Syndrome","slug":"rett-syndrome"},"lenses":[{"kind":"stakeholder","label":"Parent","value":"parent"},{"kind":"domain","label":"Context","value":"context"},{"kind":"intent","label":"Concern","value":"concern"},{"kind":"lifecycle","label":"Screen","value":"screen"},{"kind":"route","label":"Screen","value":"screen"},{"kind":"empowerment","label":"Early Clarity","value":"early_clarity"}],"parent":{"key":"conditions","label":"Conditions"},"related":[{"lang":"en","slug":"when-should-i-worry-that-my-3-year-old-might-have-rett-syndrome","title":"When should I worry that my 3-year-old might have Rett Syndrome?"},{"lang":"en","slug":"when-should-i-worry-that-my-4-year-old-might-have-rett-syndrome","title":"When should I worry that my 4-year-old might have Rett Syndrome?"},{"lang":"en","slug":"when-should-i-worry-that-my-2-year-old-might-have-rett-syndrome","title":"When should I worry that my 2-year-old might have Rett Syndrome?"},{"lang":"en","slug":"when-should-i-worry-that-my-12-to-18-month-old-might-have-rett-syndrome","title":"When to worry about Rett Syndrome at 12–18 months"},{"lang":"en","slug":"what-are-the-early-signs-of-rett-syndrome-in-a-18-to-24-month-old","title":"Early Signs of Rett Syndrome in an 18-to-24-Month-Old"},{"lang":"en","slug":"when-should-i-worry-that-my-6-year-old-might-have-rett-syndrome","title":"When should I worry about Rett Syndrome in my 6-year-old?"}],"summary":"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.","answer_md":"*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.*\n\n## In short\n[Rett Syndrome](/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.\n\n## Signs worth attention\nThe pattern that matters is *loss after a normal start*, not slowness alone. Watch for:\n\n- **Loss of purposeful hand use** — and the appearance of repetitive hand movements such as wringing, washing or mouthing\n- **Loss of spoken words or babble** she previously had\n- **Slowing head growth** noted on growth charts\n- **Changes in walking** — unsteady, stiff or on tiptoes\n- **Loss of social engagement** during the regression phase\n\nA single delayed milestone is common and often resolves. A clear *regression* — going backwards — is the real flag and deserves prompt review.\n\n## The science, briefly\nMost 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.\n\n## The Pinnacle way\nNo diagnosis — and no clinical [AbilityScore®](/ask/what-is-the-abilityscore-and-how-is-it-calculated) — 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](/occupational-therapy) build on your child's own strengths. The aim is always comfort, connection and capability.\n\n## Trusted sources\nWHO ICD-11 (LD90.0); American Academy of Pediatrics and HealthyChildren.org guidance on developmental regression; ASHA on communication support.\n\n**Next step —** The kindest thing to do with worry is to check. [Book a developmental assessment](/enroll) with a Pinnacle clinician.","canonical":"https://pinnacleblooms.org/ask/should-i-be-worried-my-child-might-have-rett-syndrome","editorial":{"reviewed_at":"2026-06-11T20:12:18.613642+00:00","reviewed_by":null,"developed_by":"SETU Consortium · Pinnacle Blooms Network"},"alternates":[{"href":"https://pinnacleblooms.org/ask/should-i-be-worried-my-child-might-have-rett-syndrome","lang":"en","indexable":true}],"dimensions":[{"key":"conditions","label":"Conditions"}],"meta_title":"Rett Syndrome Worry: What to Watch & When to Check","meta_robots":"index, follow, max-image-preview:large","everyday_tip":"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.","published_at":"2026-06-10T10:22:00.074758+00:00","reading_paths":[{"key":"understand","items":[{"lang":"en","slug":"how-does-rett-syndrome-affect-a-child-s-daily-life","title":"How Rett Syndrome Affects a Child's Daily Life","reason":"Same topic"},{"lang":"en","slug":"is-rett-syndrome-considered-a-disability","title":"Is Rett Syndrome considered a disability?","reason":"Same topic"},{"lang":"en","slug":"is-rett-syndrome-genetic-or-hereditary","title":"Is Rett Syndrome Genetic or Hereditary?","reason":"Same topic"},{"lang":"en","slug":"what-are-common-myths-about-rett-syndrome","title":"What are common myths about Rett Syndrome?","reason":"Same topic"},{"lang":"en","slug":"what-are-the-types-or-levels-of-rett-syndrome","title":"Types and Stages of Rett Syndrome","reason":"Same topic"},{"lang":"en","slug":"what-causes-rett-syndrome-in-children","title":"What causes 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Learn the key sign — losing skills after a normal start — what to watch by age, and the calm, hopeful next step for your child","related_materials":[],"related_techniques":[]}