PREVIOUS QUESTION:

 

NEXT QUESTION:

 

Are boys or girls more likely to have fragile X syndrome?

ANSWER

Boys are more likely to have fragile X than girls, and they have more severe symptoms. This is because girls have two copies of the X chromosome. Even if one X chromosome has the gene change, the other copy can be fine. Boys have one X and one Y chromosome. If the X chromosome has the gene change, they will have symptoms of fragile X syndrome.

From: Fragile X Syndrome WebMD Medical Reference

SOURCES:

CDC: "Facts about Fragile X Syndrome."

Cleveland Clinic: "Fragile X Syndrome."

Fraxa Research Foundation: "Are There Treatments for Fragile X Syndrome?" and "What Causes Fragile X Syndrome?"

March of Dimes: "Fragile X Syndrome."

National Fragile X Foundation: "Fragile X syndrome."

National Human Genome Research Institute: "Learning about Fragile X Syndrome."

U.S. National Library of Medicine: "Fragile X Syndrome."

Reviewed by Renee A. Alli on September 09, 2018

SOURCES:

CDC: "Facts about Fragile X Syndrome."

Cleveland Clinic: "Fragile X Syndrome."

Fraxa Research Foundation: "Are There Treatments for Fragile X Syndrome?" and "What Causes Fragile X Syndrome?"

March of Dimes: "Fragile X Syndrome."

National Fragile X Foundation: "Fragile X syndrome."

National Human Genome Research Institute: "Learning about Fragile X Syndrome."

U.S. National Library of Medicine: "Fragile X Syndrome."

Reviewed by Renee A. Alli on September 09, 2018

NEXT QUESTION:

What tests are done during pregnancy to diagnose fragile X syndrome in the baby?

WAS THIS ANSWER HELPFUL

THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.