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PrenatalSafe® Karyo Plus

PrenatalSafe® is a non-invasive prenatal test that detects chromosomal abnormalities by analyzing cell-free fetal DNA from a pregnant woman’s blood sample.  PrenatalSafe® Karyo Plus represents an evolution of the PrenatalSafe® Karyo test. In addition to the possibility of detecting aneuploidies and structural chromosomal abnormalities affecting each chromosome, with results very similar to the determination of the fetal karyotype performed with invasive prenatal diagnostic techniques, PrenatalSafe® Karyo Plus makes it possible to identify the presence in the fetus of submicroscopic structural chromosomal abnormalities, such as 9 of the most common microdeletion syndromes. This test also includes fetal sex determination (optional).

Microdeletion syndrome

Chromosomal Region

Prevalence (at birth)

DiGeorge Syndrome

22q11.2 deletion

1/2.000 – 1/4.000

Cri-du-chat Syndrome

5p15.3 deletion

1/15.000 – 1/50.000

Prader-Willi Syndrome

15q11.2 deletion


Angelman Syndrome

15q11.2 deletion

1/10.000 – 1/20.000

1p36 deletion Syndrome

1p36 deletion

1/5.000 – 1/10.000

Wolf-Hirschhorn Syndrome

4p16.3 deletion

1/20.000 -1/50.000

Jacobsen Syndrome

11q23-q24.3 deletion


Langer-Giedion Syndrome

8q24.11-q24.13 deletion


Smith-Magenis Syndrome

17p11.2 deletion

1/15.000 – 1/25.000

PrenatalSafe® Karyo Plus  is not indicated for dichorionic twin pregnancies.
PrenatalSafe® Karyo Plus can be integrated, for free, with RhSafe® test, a non-invasive prenatal exam that, analyzing the fetal DNA isolated from a blood sample of the mother to be, allows to determine fetal Rh(D) Factor. RhSafe® test is optional, and is performed for free (on request) in Rh(D) negative pregnant women, with a Rh(D) positive male partner.


24 chromosomes, 9 microdeletions, structural chromosome abnormalities

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