{"h1":"Do girls show Rett Syndrome differently?","faq":[{"a":"Rett Syndrome is linked to a gene on the X chromosome. Girls have two X chromosomes, which shapes the classic staged pattern we recognise. Boys, with a single X, are affected far less often and usually quite differently and more severely. Your clinician can explain what this means for your family.","q":"Why is Rett Syndrome seen mostly in girls?"},{"a":"Development often looks typical for the first 6–18 months, which is why early signs are easily missed. A plateau or gentle loss of skills — less babble, reduced engagement, loss of purposeful hand use — typically follows. A clinician can review the timeline with you.","q":"At what age do signs usually appear in girls?"},{"a":"Yes — many girls retain warm, expressive eye-gaze even when spoken words are limited, and this becomes a powerful channel for connection. Therapy supports and builds on these strengths so she can express choices and engage with the people she loves.","q":"Can girls with Rett Syndrome still communicate?"},{"a":"Loss of established skills — words, babble or purposeful hand use — always deserves prompt clinical attention, whatever the eventual cause. Arrange a developmental review without delay. Only a qualified clinician can assess and explain what's happening.","q":"What should I do if my daughter is losing skills she once had?"}],"lang":"en","slug":"do-girls-show-rett-syndrome-differently","title":"Do girls show Rett Syndrome differently?","entity":{"key":"rett","kind":"condition","name":"Rett Syndrome","slug":null},"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":"how-does-rett-syndrome-affect-a-child-s-motor-development","title":"How Rett Syndrome Affects Motor Development"},{"lang":"en","slug":"what-are-the-early-signs-of-rett-syndrome-in-girls","title":"Early Signs of Rett Syndrome in Girls"},{"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-is-rett-syndrome-and-what-does-it-look-like-in-early-childhood","title":"What is Rett Syndrome, and what does it look like in early childhood?"},{"lang":"en","slug":"what-are-the-early-signs-of-rett-syndrome","title":"Early Signs of Rett Syndrome"},{"lang":"en","slug":"what-are-the-early-signs-of-rett-syndrome-in-a-6-year-old","title":"Early Signs of Rett Syndrome in a 6-Year-Old"}],"summary":"Rett Syndrome is seen mainly in girls because of its X-linked basis, and typically unfolds in stages: ordinary early months, then a plateau or loss of hand use, babble and engagement between 6–18 months, often with retained eye-gaze communication. Boys are affected far less often and usually more severely. Loss of established skills always warrants prompt clinical review; only a Pinnacle clinician can assess and diagnose.","answer_md":"*If you have a daughter and the word \"Rett\" has entered your world, you are likely searching for what this looks like in girls specifically — let's walk through it gently and clearly.*\n\n## In short\nRett Syndrome is recognised classically in girls, and there's a biological reason for that: it's linked to a gene on the X chromosome. Girls typically develop in a way that looks ordinary for the first **6–18 months**, then go through a period where earlier skills — like purposeful hand use and babble — slow or fade, and characteristic hand movements appear. Boys are affected far less often and usually quite differently and more severely, which is why most of what we describe applies to girls. None of this is a diagnosis you can make at home — but knowing the pattern helps you ask the right questions.\n\n## What this tends to look like in girls\nBecause girls have two X chromosomes, the typical Rett picture (ICD-11 **LD90.0**) tends to unfold in recognisable stages rather than all at once:\n\n- **Early months** — development often appears typical, which is why early signs are easy to miss\n- **6–18 months** — a plateau or gentle loss of skills already gained: less babbling, reduced eye engagement, slowing head growth\n- **Loss of purposeful hand use** — replaced by repetitive hand movements such as wringing, washing, mouthing or clapping motions\n- **Movement and walking changes** — unsteady gait, or difficulty starting to walk\n- **Communication shifts** — many girls retain warm, expressive *eye gaze* even when spoken words are limited, and this becomes a powerful channel for connection\n\nEvery girl's path is her own. Some are mildly affected; others need more support. The reassuring thread is that intervention — communication, motor, sensory — meets her where she is.\n\n## When to seek advice promptly\nIf your daughter is *losing* skills she once had — words, babble, or the ability to use her hands purposefully — or her head growth seems to be slowing, please arrange a developmental review without delay. Loss of established skills always deserves prompt clinical attention, whatever the eventual explanation.\n\n## The Pinnacle way\nA 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 the care of a qualified clinician — never from an online description or form. Our approach builds on a girl's strengths, especially eye-gaze communication and motor support, through [occupational therapy](https://www.pinnacleblooms.org/best-occupational-therapy-center-india-proven-improvement-rate) and a coordinated plan tailored to her. Begin here at our [developmental support home](/) to understand the next steps.\n\n## Trusted sources\nWorld Health Organization ICD-11 (LD90.0); American Academy of Pediatrics guidance on developmental surveillance; ASHA resources on communication in complex developmental conditions.\n\n**Next step —** If you've noticed a loss of skills or the hand movements described here, book a developmental assessment with a Pinnacle clinician — early clarity opens the door to early support.\n\nThis is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.","canonical":"https://pinnacleblooms.org/ask/do-girls-show-rett-syndrome-differently","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/do-girls-show-rett-syndrome-differently","lang":"en","indexable":true},{"href":"https://pinnacleblooms.org/ask/do-girls-show-rett-syndrome-differently-te","lang":"te","indexable":true}],"dimensions":[{"key":"conditions","label":"Conditions"}],"meta_title":"Rett Syndrome in Girls: What It Looks Like","meta_robots":"index, follow, max-image-preview:large","everyday_tip":"Lean into eye-gaze connection: hold two choices up at her eye level — a toy and a snack — and watch where her eyes settle, then warmly respond to her 'choice'. Many girls communicate beautifully through gaze even when words are hard, and honouring it builds confidence and connection.","published_at":"2026-06-10T10:50:00.103034+00:00","reading_paths":[{"key":"understand","items":[{"lang":"en","slug":"what-is-rett-syndrome-and-what-does-it-look-like-in-early-childhood","title":"What is Rett Syndrome, and what does it look like in early childhood?","reason":"Linked from this answer"},{"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 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repetitive hand wringing or washing movements, and any slowing of head growth. Loss of established abilities is the key flag and deserves prompt clinical review.","authority_links":[{"url":"https://icd.who.int/","code":"LD90.0","label":"WHO ICD-11 — Rett Syndrome (LD90.0)"},{"url":"https://www.healthychildren.org/","label":"AAP HealthyChildren — developmental surveillance"},{"url":"https://www.asha.org/","label":"ASHA — communication in complex developmental conditions"}],"last_reviewed_at":"2026-06-10T10:50:00.103034+00:00","meta_description":"Rett Syndrome is seen mainly in girls for X-linked reasons, unfolding in stages with loss of hand use and retained eye-gaze. When to seek prompt review.","related_materials":[],"related_techniques":[]}