1. Prenatal diagnosis is possible via amniocentesis or chorionic villus sampling. 2. Prenatal diagnosis is possible using amniocentesis or chorionic villus sampling. 3. Triple X syndrome can be diagnosed prenatally through amniocentesis or chorionic villus sampling. 4. The diagnosis can also be made prenatally by chorionic villus sampling or amniocentesis. 5. Progenitors mature as they migrate upward onto the villus . 6. It has also been observed to cause villus ischemia, and increase intestinal motility. 7. Chorionic Villus Sampling ( CVS ) : Optional test performed in the ninth to 11th week. 8. Chorionic villus sampling or amniocentesis can be used to detect NF-1 in the fetus. 9. NF II can be diagnosed with 65 % accuracy prenatally with chorionic villus sampling or amniocentesis. 10. The two tests used to diagnose Down syndrome in the study were chorionic villus sampling and amniocentesis. 
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