Triple X syndrome
Find out why Mayo Clinic is the right place for your health care. Make an appointment..
Find a directory of doctors and departments at all Mayo Clinic campuses. Visit now..
See how Mayo Clinic research and clinical trials advance the science of medicine and improve patient care. Explore now..
Educators at Mayo Clinic train tomorrow’s leaders to deliver compassionate, high-value, safe patient care. Choose a degree..
Explore Mayo Clinic’s many resources and see jobs available for medical professionals. Get updates..
Your support accelerates powerful innovations in patient care, research and education. Give today..
Triple X syndrome, also called trisomy X, is a genetic disorder that affects about 1 in 1,000 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 have no symptoms or only mild symptoms. In other cases, symptoms may be more pronounced — possibly including developmental delays and learning disabilities.
Treatment for triple X syndrome depends on which symptoms, if any, are present and their severity. Normal sexual development and the ability to have children are typical for most females who have triple X syndrome.
Signs and symptoms can vary greatly among girls and women with triple X syndrome. Some may experience no noticeable effect. Others may have mild symptoms. Occasionally significant symptoms may occur. If signs and symptoms do appear, they may include varying degrees of severity or any combination of these:
Occasionally, triple X syndrome may be associated with these signs and symptoms:
Generally, girls and women with triple X syndrome have intelligence in the normal range, but possibly slightly lower when compared with siblings.
If you’re concerned about your daughter’s development, make an appointment to talk with your family doctor or pediatrician. Your doctor can help determine the cause and suggest appropriate action.
Although triple X syndrome is genetic, it’s usually not inherited — it’s due to a random genetic error.
Normally, people have 46 chromosomes in each cell, organized into 23 pairs, which includes two sex chromosomes. One set of chromosomes is from the mother and the other set is from the father. These chromosomes contain genes, which carry instructions that determine everything from height to eye color.
The pair of sex chromosomes — either XX or XY — determines a child’s sex. A mother can give the child only an X chromosome, but a father can pass on an X or a Y chromosome:
Females with triple X syndrome have a third X chromosome from a random error in cell division. This error can happen before conception or early in the embryo’s development, resulting in one of these forms of triple X syndrome:
Triple X syndrome is also called 47,XXX syndrome because the extra X chromosome results in 47 chromosomes in each cell instead of the usual 46.
Although some females may have no or mild symptoms associated with triple X syndrome, developmental delays or learning disabilities often occur and may lead to a variety of other issues, including:
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Check out these best-sellers and special offers on books and newsletters from Mayo Clinic.
Any use of this site constitutes your agreement to the Terms and Conditions and Privacy Policy linked below.
A single copy of these materials may be reprinted for noncommercial personal use only. “Mayo,” “Mayo Clinic,” “MayoClinic.org,” “Mayo Clinic Healthy Living,” and the triple-shield Mayo Clinic logo are trademarks of Mayo Foundation for Medical Education and Research.
This site complies with the HONcode standard for trustworthy health information:
verify here.
Triple X syndrome
Research & References of Triple X syndrome|A&C Accounting And Tax Services
Source
0 Comments
Trackbacks/Pingbacks