Triple X, also called trisomy X and 47,XXX, is a genetic condition that occurs when a girl receives three X chromosomes from her parents. Typically, girls only receive two X chromosomes. Triple X affects 1 in 1, females. According to the National Institutes of Health, 5 to 10 girls are born with the disorder in the United States every day. Some girls and women with triple X syndrome show no symptoms at all, causing the disorder to go undiagnosed. If symptoms do occur, they commonly include physical abnormalities like:. Without strong and developed muscles, babies with triple X may be slow to walk. As they grow older, they may be clumsier than girls without the syndrome.
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Trisomy X , also known as triple X syndrome and characterized by the karyotype [note 1] 47,XXX , is a chromosome disorder in which a female has an extra copy of the X chromosome. Those who have symptoms can have learning disabilities , mild dysmorphic features such as hypertelorism wide-spaced eyes and clinodactyly incurved little fingers , early menopause , and increased height. The average intelligence quotient IQ in trisomy X is 85— As the symptoms of trisomy X are often not serious enough to prompt a karyotype test, many cases of trisomy X are diagnosed before birth via prenatal screening tests such as amniocentesis. Research on girls and women with the disorder finds that cases which were diagnosed postnatally, having been referred for testing because of obvious symptoms, are generally more severe than those diagnosed prenatally. Most women with trisomy X live normal lives, although their socioeconomic status is reduced compared to the general population. Trisomy X occurs via a process called nondisjunction , in which normal cell division is interrupted and produces gametes with too many or too few chromosomes.
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Triple X syndrome is a genetic condition found in females only. About 1 in 1, girls have it. Other symptoms can include problems with spoken language and processing spoken words, coordination problems, and weaker muscles. Most girls with triple X syndrome can grow up healthy, have normal sexual development and fertility, and lead productive lives. Depending on which symptoms a girl has and how severe they are, doctors may recommend various treatments. Girls who have triple X syndrome are born with it. It's called triple X because they have an extra X chromosome in most or all their cells. Usually, a person has 46 chromosomes in each cell, divided into 23 pairs, which includes two sex chromosomes.
Triple X syndrome, also called trisomy X or 47,XXX, is a genetic disorder that affects about 1 in 1, females. Females normally have two X chromosomes in all cells — one X chromosome from each parent. In triple X syndrome, a female has three X chromosomes. Many girls and women with triple X syndrome don't experience symptoms or have only mild symptoms. In others, symptoms may be more apparent — possibly including developmental delays and learning disabilities. Seizures and kidney abnormalities occur in a small number of girls and women with triple X syndrome. Treatment for triple X syndrome depends on which symptoms, if any, are present and their severity. Signs and symptoms can vary greatly among girls and women with triple X syndrome. Many experience no noticeable effects or have only mild symptoms. Being taller than average height is the most typical physical feature.