SCIENTIFIC BACKGROUND

XXX

Category:

Triple X syndrome, also known as 47,XXX syndrome or trisomy X, is characterized by a trisomy of the X chromosome. Patients do not usually show significant physical symptoms apart from above average height. As the clinical impact is highly variable, many women with triple X are never diagnosed with this chromosomal aberration. About 70% of women are fertile, but some present with menstrual irregularities and premature menopause. Intelligence may be 10-15 points below the family average. Speech development may be delayed. Offspring of triple X women are not found to be at a higher risk for gonosomal aneuploidy.

 

The prevalence of triple X syndrome is reported to be approximately 1:1,000 in female newborns. In 98% of patients, trisomy X is found in all cells, while 2% show mosaicism.

 

References
Ogata et al. 2001, J Med Genet 38:1 / Müller-Henbach et al. 1977, Am J Obstet Gynecol 127:211

GENES

XXX
How to order

LATEST ARTICLES

Mosaicism is a biological phenomenon in which a person has two or more genetically different sets of cells. Although mosaicism may have no effect, it...

Read more

Background information on in vitro diagnostic services Laboratory-based testing methods and medical devices play a critical role in diagnosis and ...

Read more

Traditional DNA tests may overlook 10% of classic in Familial Adenomatous Polyposis (FAP) cases. By integrating RNA sequencing, researchers unveiled ...

Read more

Overview In January 2024, the American Society of Clinical Oncology (ASCO) and the Society of Surgical Oncology (SSO) published new recommendation...

Read more

Endometriosis is a chronic gynecological condition that affects 1 in 10 women of reproductive age worldwide [1]. It can manifest with the first menst...

Read more

Rare Disease Day is a global awareness day held annually to raise awareness of all rare diseases. It was first celebrated in 2008, on the rarest day ...

Read more

Cancer is a group of genetic diseases that can develop almost anywhere in the body. Many people in the world are affected by cancer every year. Follo...

Read more

Aiming to evaluate the role of chromosomal aneuploidy in pregnancy loss, a 2023 study 35 years in the making evaluated the genomic landscape of first...

Read more

Cancer is a complex genetic disease that affects millions of people in the world. It is one of the leading causes of death worldwide, with about ten ...

Read more

Researchers created a detailed map of the placenta during labor. By studying how maternal and fetal cells communicate, they discovered signals in the...

Read more