Tests and diagnosisBy Mayo Clinic staff
Because many girls with triple X syndrome are healthy and have a normal appearance, they may remain undiagnosed all their lives, or the diagnosis may be discovered while investigating for other reasons.
Prenatal genetic testing, such as amniocentesis or chorionic villus sampling, can provide a diagnosis of triple X syndrome before birth.
After birth, triple X syndrome can be diagnosed by performing a chromosome analysis on a blood sample taken from your daughter.
Before genetic testing, it's important to receive genetic counseling to provide you with all the information about triple X syndrome.
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