The three-day test is an examination of prenatal screening for chromosomal abnormalities more common.
is made from the fifteenth to the eighteenth week of pregnancy and is done with a simple blood test, which is then analyzed by a laboratory specialized. This analysis is the evaluation of the assay in maternal blood of three substances that originate from the fetus and placenta. If concentrations of these substances in maternal blood do not match the normal parameters, may indicate a genetic problem of the child. In fact, the tri-test, is positive in about 55 percent of fetuses with abnormal chromosomes. The tri-test is part of a series of tests that run for free during pregnancy and is performed in almost all hospitals.
is made from the fifteenth to the eighteenth week of pregnancy and is done with a simple blood test, which is then analyzed by a laboratory specialized. This analysis is the evaluation of the assay in maternal blood of three substances that originate from the fetus and placenta. If concentrations of these substances in maternal blood do not match the normal parameters, may indicate a genetic problem of the child. In fact, the tri-test, is positive in about 55 percent of fetuses with abnormal chromosomes. The tri-test is part of a series of tests that run for free during pregnancy and is performed in almost all hospitals.
The result is delivered within three to four days. 
The Tritest therefore gives no certainty, but allows could identify those women who decide to undergo amniocentesis , having a higher risk of giving birth to a child with Down Syndrome.
The Tritest therefore gives no certainty, but allows could identify those women who decide to undergo amniocentesis , having a higher risk of giving birth to a child with Down Syndrome. It 'important to note that about 98% of women with a positive Tritest (and thus have a higher risk of having a child with Down syndrome), give birth to a perfectly normal child.
To increase the estimated risk of having a child with Down syndrome is now associated with the Tritest test of nuchal translucency "ultrasound investigation that is performed between the 10th and the 13th week of gestation. The test involves measuring the thickness of edema (accumulation fluid) in the subcutaneous level of the neck of the fetus: this area, in fact, tends to have increased dimensions in individuals with Down Syndrome.
To increase the estimated risk of having a child with Down syndrome is now associated with the Tritest test of nuchal translucency "ultrasound investigation that is performed between the 10th and the 13th week of gestation. The test involves measuring the thickness of edema (accumulation fluid) in the subcutaneous level of the neck of the fetus: this area, in fact, tends to have increased dimensions in individuals with Down Syndrome.
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