Down's Syndrome

2779 WordsOct 8, 199912 Pages
Down's Syndrome Down's syndrome is a genetic condition involving an extra chromosome, this change occurs around the time of conception. A person with Down's syndrome has forty-seven chromosomes instead of the usual forty-six. A relatively common genetic disorder, Down's strikes 1 out of 600 babies. In 95 percent of all cases, the disorder originates with the egg, not the sperm, and the only known risk factor is advanced maternal age-at age 35, a woman has 1 chance in 117 of having a baby with Down's; at 40, her odds are 1 in 34. (Graves, 1990) People with Down's syndrome all have a certain degree of learning disability . This means that they develop and learn more slowly than other children. However, most children with Down's…show more content…
Each probe has been designed to attach to a specific chromosome in the nucleus. Using a special microscope, a scientist can count the dots of various colors. Three of a specific color means that there is one extra chromosome of that type. The institute will test five pairs that account for most chromosomal defects. The first cases will be done for free. When the procedure becomes common, the procedure will add about $2,000 to the cost of IVF, about $7,500. The Chairman of reproductive endocrinology at the Jones Institute said the procedure was developed primarily to avoid the multiple births that sometimes happen with IVF. (www #1) Most transplanted embryos, and many naturally conceived ones, never take root and grow because they have the wrong number of chromosomes. In IVF, doctors try to improve the odds by implanting three or more, assuming that some will be lost. But sometimes, many or all of the embryos are viable. The parents then must decide - do they selectively abort some, or do they take on the hugely demanding task of having many babies at once? If doctors could screen the embryos, he said, they could limit themselves to implanting two and still enjoy a high probability that the embryos will survive. Nevertheless, the ability to screen out embryos with Down syndrome still worries families of people with the condition. (www #1) The option not

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