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Israeli Society of Medical Genetics NIPT Committee Opinion 072013: Non-invasive prenatal testing of cell-free DNA in maternal plasma for detection of fetal aneuploidy

Rachel Michaelson-Cohen, Ruth Gershoni-Baruch, Reuven Sharoni, Mordechai Shochat, Yuval Yaron, Amihood Singer
Fetal Diagnosis and Therapy 2014, 36 (3): 242-4
25138112
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.

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