The investigator want to study the population of high risk (over 1/50) of Trisomy 21. According to french guidelines, these patients needs to have a invasive test (such as amniocentesis) but some patients prefer to have a Non Invasive Prenatal Test, with a potential lack of information.
Study Type
OBSERVATIONAL
Enrollment
150
prenatal routine test for Trisomy 21 screening (blood test + nuchal translucency test)
number of genetics anomalies
Time frame: through study completion, an average of 9 months
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