Tests that are conducted during pregnancy to detect abnormalities in chromosomes, contribute to an increase in the risk of miscarriage twice, say scientists.

A team of scientists said at a European conference on genetics that women need more information about what is potentially at risk for them during pregnancy. For example, some tests of amniotic fluid can cause miscarriage, scientists said..

According to experts, one of the most famous examples of chromosomal abnormality is Down's syndrome, in which the fetus has an additional copy of one of the chromosomes. Down's syndrome is a congenital developmental disorder manifested by mental retardation, bone growth disorder and other physical anomalies. This is one of the most common forms of mental retardation. Thanks to modern medicine people with this syndrome can live more than 50 years.

One way to identify the syndrome is an amniocentesis. This procedure consists in aspirating the fluid (amniotic fluid) in which the embryo is located in the uterus by piercing the amniotic bladder through the abdominal wall.

As a result of this test, you can also identify diseases such as Edward's syndrome and Pato's syndrome. However, according to estimates of scientists, approximately one in one hundred women after an amniocentesis there is a miscarriage.

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