There is nothing scary about Down syndrome

Several features of Down syndrome, such as cognitive disability and developmental delays, resulting from the presence of extra genes from the 21st chromosome. Typically, hong kong down’s syndrome test children have an upward slant to the eyes, flattened nose bridges, creases on the palms of the hands, and weaker muscles. Not all of these features occur in children with Down syndrome.

Approximately one out of every 1,000 babies in the United States has Down syndrome. There are no relationships between Down syndrome and culture, ethnicity, socioeconomic status, or geography. According to statistics, the odds of having a child with hong kong nipt service are correlated with the age of the mother. Under the age of 25, there is about a 1 in 1,400 chance to have a child with Down syndrome. At 35, the odds are about 1 in 350. At 40, there is about a 1 in 100 chance.

There are approximately 95 percent of those with Down syndrome who have trisomy 21, meaning they have three chromosomes instead of two. Our chromosomes are composed of 23 pairs of genes each. Trisomy 21 is a genetic condition that occurs when the 21st chromosome pair in an egg or sperm does not split as normally occurs during the development of the egg or sperm. A double dose of the 21st chromosome is carried by the egg or sperm.

Approximately 95 to 97 percent of the extra chromosome is inherited from the mother. Translocation, in which a portion of the 21st chromosome gets attached to another chromosome, occurs in approximately 3 to 4 percent of people with Down syndrome. The extra 21st chromosome material is usually carried in a “balanced” or hidden form in approximately half of the cases.