2-O carrying of the syndrome of Down – who is? In the year of 1866 the English doctor John Langdon Down described the Syndrome of Down, syndrome this that takes its name in its homage, where it affirmed that superior races to the others existed, being the mental deficiency characteristic of the races inferior, that presented physical characteristics similar to the inhabitants of the Monglia, being, therefore labelled of Mongolian children. These characteristics had been described for the doctor as: hair smooth and scarce chestnuts; flattened and wide face; located eyes on-line oblique line and small nose. In accordance with the World-wide Organization of Health, the number of people with Down, corresponds 10% of the inhabitants of the planet. The SD can happen in women of any etria band, however she has a bigger probability with the advance of the age, therefore women above of 35 years present greater frequency of errors in the distribution of the chromosomes, when compared with women below of this age. (Murahovschi, 2003). In the mothers with up to 30 years of age, the probability to have a son with this Syndrome of 1 (one) in 1000 (a thousand) is been born livings creature, increasing for approximately 1 (one) in 400 (four hundred) to 35 years and approximately 1 (one) in the 30 (thirty) after 45 years of age. Its average prevalence is esteem in 1 (one) to each 600 (six hundred) births, varying with the age materna as it was seen previously.
It presents peculiar and constant physical and mental characteristics, thus characterizing classic signals, being gifts in all the carriers of the SD. These are essential for the precocious diagnosis of the syndrome. ' ' Some children present a bigger number or lesser of signals without it can establish any relation enters the number of signals and the degree of development that child alcanar' '.