NEW YORK (GenomeWeb News) – Aetna this week issued a clinical policy bulletin suggesting that it may soon begin covering non-invasive prenatal DNA tests for Down syndrome.

In its bulletin, the health insurer said that it "considers measurement of cell-free nucleic acids in maternal blood … medically necessary for testing for fetal aneuploidy (trisomy 13, 18, 21) in pregnant women with single gestations," who meet any one of a set of criteria.

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In PLOS this week: new gene linked to ocular coloboma, new statistical model for interrogating gene expression networks, and more.

With a new collection, PLOS highlights negative results it has published.

A pair of researchers examines political leanings and views on genomics, finding more of a role for optimism and pessimism in people's views.

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