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FISH ANALYSIS:
Fetal Aneuploidy Screening
Fetal aneuploidy screening is a prenatal FISH analysis which identifies numerical abnormalities of chromosomes 13, 18, 21, X, and Y.
- Advanced maternal age
- Ultrasound abnormalities
Prenatal FISH analysis for numerical chromosomal abnormalities is performed on interphase nuclei. This assay yields preliminary results only. Chromosomal analysis is also performed on all specimens submitted for fetal aneuploidy screening.
Amniotic fluid: Collect 20 – 25 cc in a 50 ml sterile conical centrifuge tube.
Chorionic villi: Collect 15 – 20 mg villi in a T-25 tissue culture flask containing sterile tissue culture media.
3 - 4 days
88271, 88275, 88291
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