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" ... Until recently, the only way to test the genetic makeup of a fetus was through amniocentesis ("amnio"), an invasive procedure in which a doctor inserts a long needle directly into the womb and collects a sample of amniotic fluid. This test is not only uncomfortable, but it also carries a small risk of miscarriage. Fortunately, it may soon become completely unnecessary, thanks in part to advances in DNA sequencing. ... "