Chorionic Villous Testing Versus Amniocentesis After Abnormal Noninvasive Prenatal Testing.

In the setting of a normal first-trimester ultrasound, an amniocentesis may be a better option than chorionic villous sampling for invasive diagnostic testing after a cell-free DNA high risk for trisomy 13, given the high rates of confined placental mosaicism. In unaffected fetuses, other evaluation... View More