Feedback
Join Now | Sign in
My Healthline
Free Newsletters
 

Down Syndrome : Causes

Healthline's Premium Tools

Pill Finder
Search by color, shape and markings. click here
Drug Interaction Checker
Check any 2 drugs for interactions. click here
Drug Compare
Compare any two drugs side by side. click here
Healthline Part D Plan Selector Medicare Part D
Medicare's drug plans are subsidized by the US federal government and offered through insurers.
Advertisement
Marketplace

Causes List

Causes could include:
  • Anomaly of chromosome pair 21

Causes Overview Articles

Down syndrome
In most cases, Down syndrome occurs when there is an extra copy of chromosome 21. This form of Down syndrome is called Trisomy 21. The extra chromosome causes problems with the way the body and brain develop. Down syndrome is the most common singl...
Source:ADAM
Date:May 10, 2007
Down Syndrome
Diagnosis is usually suspected at birth, when the characteristic physical signs of Down syndrome are noted. Once this suspicion has been raised, genetic testing (chromosome analysis) can be undertaken in order to verify the presence of the disorde...
Source:Gale Encyclopedia of Children's Health
Down Syndrome
In approximately one to two percent of Down syndrome cases, the original egg and sperm cells contain the correct number of chromosomes, 23 each. The problem occurs sometime shortly after fertilization—during the phase when cells are dividing...
Source:Gale Encyclopedia of Genetic Disorders Part II
Down Syndrome
Down syndrome is usually the result of an extra copy of chromosome 21 (trisomy 21). As described earlier, Down syndrome may occur because of: nondisjunction within the sperm, or more commonly, the egg cell; genetic mosaicism, which occurs after co...
Source:Gale Encyclopedia of Nursing and Allied Health
Down Syndrome
Diagnosis is usually suspected at birth, when the characteristic physical signs of Down syndrome are noted. Once this suspicion has been raised, genetic testing (chromosome analysis) can be undertaken in order to verify the presence of the disorde...
Source:Gale Encyclopedia of Medicine
Down syndrome
In approximately one to two percent of Down syndrome cases, the original egg and sperm cells contain the correct number of chromosomes, 23 each. The problem occurs sometime shortly after fertilization—during the phase when cells are dividing...
Source:Gale Encyclopedia of Genetic Disorders Part I
Advertisement
Back to Top