Rett Syndrome (FAQ)

Answers to questions families often have about caring for their child withn Rett syndrome

What is Rett syndrome?

Rett syndrome is a rare, non-inherited, genetic neurodevelopmental disorder which starts to be apparent in infancy or early childhood. It is seen mostly in girls, though it can occur rarely in boys. It is found in all racial and ethnic groups throughout the world. It affects 1 in 10,000 females and is the most common cause of intellectual disability in girls.

How do you get Rett syndrome?

Most cases of Rett syndrome are caused by a spontaneous mutation (a change in the gene) in the MECP2 gene on the X chromosome. The MECP2 gene makes a protein, also called MECP2, believed to play an important role in turning off other genes. The MECP2 mutation causes the turn-off mechanism to fail, making other genes stop working normally. There are many genetic variations of Rett syndrome. Even if two girls have the same mutation it does not mean they will have all of the same symptoms.

What are the symptoms?

The age when Rett syndrome starts and the severity of symptoms varies. Each case is unique, with its own traits and progression. Children with Rett syndrome are usually born healthy, with an early period of apparently normal or near-normal development until 6-18 months of life, when there is a slowing down or stagnation of skills. This is usually followed by a period of regression when the child loses communication skills and purposeful use of her hands. Children may start to show other symptoms, including:

  • Slowed rate of growth for head, feet, and hands
  • Involuntary hand movements
  • Loss of mobility or and gait (walking/running manner) disturbances
  • Breathing issues
  • Seizures
  • Scoliosis (sideways curvature of the spine)
  • Sleep problems
  • Loss of muscle tone
  • Irritability and inconsolable crying
  • Difficulties with feeding, chewing, and swallowing
  • Apraxia (a speech disorder usually caused by muscle weakness)

Over time, motor problems may increase, while interaction and communication, especially with eye gaze, seizures, and irregular breathing may improve. Most people with Rett syndrome need assistance with all aspects of daily living.

Symptoms may be different for the variant forms including the male form and are described in the Rett Syndrome.

How is it diagnosed?

Rett syndrome is diagnosed based on the signs and symptoms observed in the child. A blood test can be done to check for the MECP2 mutation. This genetic test can confirm the clinical diagnosis, but might sometimes be negative, even in girls who geneticists have diagnosed with Rett syndrome.

What is the expected outcome?

Most girls with Rett syndrome live to about their mid-40s, although there is a small percentage who die unexpectedly of unknown causes. In one recent study in China, girls with Rett syndrome had a 100% survival rate at 10 years of age and 87.5% at 25 years of age. [Wong: 2007] Causes of early death include heart rhythm abnormalities, seizures, and pneumonia; however, there does not appear to be any single cause. [Kerr: 1999] has recommended ECG screening for heart rhythm abnormalities and EEG screening for seizures. If heart rhythm abnormalities and seizures are present or suspected, they should be discussed with your medical home provider.

Will anyone else in the family get Rett syndrome?

The chance of having more than one child with Rett syndrome is very small. If a family has an affected daughter and no other affected relatives, the recurrence risk is much less than 1% for the family and children. This means that more than 99.5% of the time the mutation is spontaneous, happens only with this pregnancy, and is not repeated in a family. If there are concerns, both parents can be tested for mutations before deciding to have other children. Talk with your doctor or a genetic counselor about testing.

In rare cases where families have more than one affected child, the situation is different and would need to be addressed individually by talking with a genetic counselor.

The chances of a child being born with Rett syndrome are not affected by the age of the parents, or by the child’s birth order. Because the mutation is usually spontaneous, parents did not do anything to cause it. The percentage of children born with Rett syndrome is similar among racial and ethnic groups.

What is the treatment?

There are no treatments for the underlying cause for the disorder, although there are many therapies to help with your child's symptoms. These include therapies to help with development, such as physical, occupational, and language therapy, and medications to treat seizures, if present. Augmentative Communication (AAC) devices or alternative communication can be used to help your child communicate. Other specific problems, such as feeding problems, are addressed individually by your child's doctors

How will my family’s life be changed?

Every child with Rett syndrome is unique and the level of disability seen with the disorder ranges from mild to severe. Your child may need lifelong help with activities of daily living such as eating, dressing, bathing. You may need to lift and carry your child, or help her walk. You and your child may need to learn to use a communication device. Some children may need a feeding tube.

It is of great value to contact a family support group for more information and support for the child and family as the family learns about this diagnosis and how it will impact their child. (see There is a lot of support available to help you find the right professionals, schedule appointments and therapies, search for the right schools or programs, and find any special equipment you may need.

Keep in mind that children with Rett syndrome can still communicate and learn. Adaptations can be made to help them learn some independent skills and lead a full life. Children can learn to use augmentative devices to communicate with family and friends and learn new things well into middle age and beyond. They can express a full range of emotions and join in social, educational and recreational activities at home and in the community.

Because Rett syndrome is a rare disorder, it is important to be an advocate for your child. This may involve keeping informed about treatments and therapies, and working with your health insurer to get coverage (see Working with Insurance Companies), or talking with your child’s teacher about her abilities to make sure her needs are met at school.

Sometimes my daughter breathes faster than normal. What happens when she hyperventilates?

Episodes of rapid breathing (hyperventilation) are seen in many girls with Rett syndrome but the reason is unknown. Fast or deep breathing releases more carbon dioxide from the body than usual, causing carbon dioxide level in the blood to fall. Carbon dioxide is one of the body’s normal waste products and it manages keep the acid-base balance normal so that cells can function well. Hyperventilation may cause her to feel dizzy and her fingers to tingle but it rarely causes serious problems. For most girls, irregular breathing patterns become less noticeable as they get older.

What should we do about her irregular breathing?

While parents may be concerned about breath-holding and other irregular breathing, it is usually followed by regular breathing. Experts recommend a low-key approach, taking comfort in the fact that girls become used to the irregular breathing and regular breathing will soon return. While it may seem like forever, it is important to stay calm and in control. Keep an eye on her breathing, watching for any signs of pneumonia, especially aspiration pneumonia, and seek medical attention if this is suspected

Should my daughter with Rett syndrome have an electrocardiogram (ECG)?

Some girls with Rett syndrome will have problems with heart rhythm, which can cause serious problems. By age 5, your child should have an ECG performed. If normal, it should be repeated every other year. If abnormal, a cardiologist who is an expert in heart rhythm abnormalities should be consulted. Most “nonspecific” ECG changes do not need to be treated but a condition called “long QT syndrome” may require treatment with medicine.

Do children with Rett syndrome have seizures?

Nearly 70-90% of children with Rett syndrome have seizures. Children may start having seizures early, during their first year of life, or as late as puberty. Some children may have multiple seizures every day, while other children may have seizures only rarely. Abnormal electroencephalogram (EEG, or brain wave test) findings are common in children with Rett syndrome, even those who do not have seizures, and regular EEGs may be recommended. Most children with Rett syndrome have a neurologist on their care team who will direct management and use of medications to treat seizures.

What does the future hold for people with Rett syndrome?

Research into medications, gene therapy, and other treatments is ongoing. Researchers are continuing to learn more about Rett syndrome and there are many reasons to be hopeful. Many people with Rett syndrome live into middle age and beyond, and with adaptations can live rewarding lives. Connecting with other families can help parents find joy in the journey.


Information & Support

Related Portal Content
Rett Syndrome
Assessment and management information for the primary care clinician caring for the child with Rett syndrome.
Care Notebook
Medical information in one place with fillable templates to help both families and providers. Choose only the pages needed to keep track of the current health care summary, care team, care plan, health coverage, expenses, scheduling, and legal documents. Available in English and Spanish.

For Parents and Patients

The Rett Syndrome Handbook (PDF Document 100.9 MB)
Offers a detailed guide to living with Rett syndrome and is an excellent chapter reference for the specialists treating your child.

Primary Care Guidelines (PDF Document 211 KB)
A great resource for parents and doctors on how to stay on top of a Rett syndrome diagnosis, including crucial information to know and implement as soon as possible in order for the girl with Rett syndrome to have the best chances of success.

Communication Guidelines
This book describes the communication abilities of children with Rett syndrome and discusses ways to help them be involved in meaningful school, play, and social interactions.

Nutritional Guide (PDF Document 4.4 MB)
Provides information about nutritional options, the potential difficulties that may come with a Rett syndrome diagnosis, and resources and knowledge to make the best choices for your child

Rett Syndrome Information Page (NINDS)
An overview of Rett syndrome with links to other organizations, from the National Institute of Neurological Disorders and Stroke.

Síndrome de Rett (NINDS)
Spanish language overview of Rett syndrome; National Institute of Neurological Disorders and Stroke.

Rett Syndrome (MedlinePlus)
Excellent, detailed review of condition for patients and families; National Library of Medicine and National Institutes of Health.

Rett Syndrome (MedlinePlus)
Brief description of RS and numerous links to other reliable sources of information for parents and family members; from the National Library of Medicine.

Rett syndrome (MedlinePlus Encyclopedia)
Information for families that includes description, frequency, causes, inheritance, other names, and additional resources; from the National Library of Medicine.

Patient Education

Kids with Tubes
Information about tube-feeding from families, for families. Although the site is not updated often, the information remains valuable.

Services for Patients & Families in Rhode Island (RI)

For services not listed above, browse our Services categories or search our database.

* number of provider listings may vary by how states categorize services, whether providers are listed by organization or individual, how services are organized in the state, and other factors; Nationwide (NW) providers are generally limited to web-based services, provider locator services, and organizations that serve children from across the nation.


Rett Syndrome (
Studies looking at better understanding, diagnosing, and treating this condition; from the National Library of Medicine.

Helpful Articles

Vashi N, Justice MJ.
Treating Rett syndrome: from mouse models to human therapies.
Mamm Genome. 2019;30(5-6):90-110. PubMed abstract / Full Text

Authors & Reviewers

Initial publication: October 2012; last update/revision: July 2020
Current Authors and Reviewers:
Author: Lynne M. Kerr, MD, PhD
Reviewer: Matthew Heimburger
Funding: The Medical Home Portal thanks the 2011-2012 URLEND Medical Home Portal trainees group for their contribution to this page.
Authoring history
2017: first version: Jennifer Goldman, MD, MRP, FAAPR
AAuthor; CAContributing Author; SASenior Author; RReviewer

Page Bibliography

Kerr AM, Julu PO.
Recent insights into hyperventilation from the study of Rett syndrome.
Arch Dis Child. 1999;80(4):384-7. PubMed abstract / Full Text

Vashi N, Justice MJ.
Treating Rett syndrome: from mouse models to human therapies.
Mamm Genome. 2019;30(5-6):90-110. PubMed abstract / Full Text

Wong VC, Li SY.
Rett syndrome: prevalence among Chinese and a comparison of MECP2 mutations of classic Rett syndrome with other neurodevelopmental disorders.
J Child Neurol. 2007;22(12):1397-400. PubMed abstract