Down Syndrome Information - Causes And Symptoms
Down syndrome is a condition caused by the presence of extra genetic material in the cells of a developing embryo. The disorder-named for English physician John Langdon Down-occurs in approximately 1 in every 800 to 1,000 live births, and usually results in mental retardation and distinctive physical abnormalities.
The incidence of Down syndrome increases with the age of the parents, especially if the mothers are thirty-four or older. The risk is also higher for children of parents who have already given birth to a Down syndrome child.
Causes of down syndrome
Down syndrome is usually caused by a phenomenon geneticists call non disjunction, in which an error in cell division produces three copies of a chromosome--in this case, chromosome 21-instead of the normal two. In trisomy 21, which accounts for 95 percent of Down syndrome cases, the extra chromosome is due to an error in chromosome separation in the ovum before conception, although nondisjunction can also take place in the sperm. A small percentage of Down syndrome cases are linked to other kinds of chromosomal abnormalities, but all result in extra genetic material in some or all of the cells.
Information on the symptoms of down syndrome
Individuals with Down Syndrome may not experience all of the symptoms. Some of the common symptoms are: decreased muscle tone at birth, asymmetrical or odd-shaped skull, round head with flat area at the back of the head, small skull, slanting eyes, small mouth with protruding tongue (see tongue problems), broad short hands, single crease on the palm, retarded growth and development, delayed mental and social skills (mental retardation).People with Down syndrome are especially prone to having congenital heart disease and are more susceptible than most people to developing acute leukemia, thyroid disorders, and respiratory and digestive problems. While females with Down syndrome may menstruate and be fertile, males are almost always infertile.
Herbal Home remedies to cure down syndrome
Diagnosis of down syndrome
The diagnosis of Down Syndrome is based upon a combination of clinical presentation and genetic testing.
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