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Fetal Diagn Ther ; 36(3): 242-4, 2014.
Article in English | MEDLINE | ID: mdl-25138112

ABSTRACT

Non-invasive prenatal testing (NIPT) of cell-free fetal DNA in maternal plasma is a novel approach, designed for detecting common aneuploidies in the fetus. The Israeli Society of Medical Geneticists (ISMG) supports its use according to the guidelines stated herein. The clinical data collected thus far indicate that NIPT is highly sensitive in detecting trisomies 21 and 18, and fairly sensitive in detecting trisomy 13 and sex chromosome aneuploidies. Because false-positive results may occur, an abnormal result must be validated by invasive prenatal testing. At this juncture, NIPT does not replace existing prenatal screening tests for Down syndrome, as these are relatively inexpensive and cost-effective. Nonetheless, NIPT may be offered to women considered to be at high risk for fetal chromosomal abnormalities as early as 10 weeks of gestation. The ISMG states that NIPT should be an informed patient choice, and that pretest counseling regarding the limitations of NIPT is warranted. Women at high risk for genetic disorders not detected by NIPT should be referred for genetic counseling. A normal test result may be conveyed by a relevant healthcare provider, while an abnormal result should be discussed during a formal genetic consultation session.


Subject(s)
Aneuploidy , Maternal Serum Screening Tests , Female , Genetic Counseling , Humans , Israel , Pregnancy
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