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How is trisomy 18 diagnosed?

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A doctor may suspect trisomy 18 during a pregnancy ultrasound, although this isn't an accurate way to diagnose the condition. More precise methods take cells from the amniotic fluid (amniocentesis) or placenta (chorionic villus sampling) and analyze their chromosomes. After birth, the doctor may suspect trisomy 18 based on the child's face and body. A blood sample can be taken to look for the chromosome abnormality. The chromosome blood test can also help determine how likely the mother is to have another baby with trisomy 18. If you're concerned that your baby may be at risk for trisomy 18 because of a past pregnancy, you may want to see a genetic counselor.

From: What Is Trisomy 18? WebMD Medical Reference

SOURCES:

March of Dimes: "Birth Defects."

Trisomy 18 Foundation: "What is Trisomy 18?" 

NIH Genetics Home Reference: "Trisomy 18."

Merck Manual Professional : "Trisomy 18."

Lucille Packard Children's Hospital at Stanford: "Trisomy 18 and 13."

Rumack, Carol M. . Mosby Elsevier, 2011. Diagnostic Ultrasound, 4th ed

Reviewed by Dan Brennan on July 19, 2019

SOURCES:

March of Dimes: "Birth Defects."

Trisomy 18 Foundation: "What is Trisomy 18?" 

NIH Genetics Home Reference: "Trisomy 18."

Merck Manual Professional : "Trisomy 18."

Lucille Packard Children's Hospital at Stanford: "Trisomy 18 and 13."

Rumack, Carol M. . Mosby Elsevier, 2011. Diagnostic Ultrasound, 4th ed

Reviewed by Dan Brennan on July 19, 2019

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Is there any treatment for trisomy 18?

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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.

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