This Week in PNAS

Researchers from China and the US report on efforts to sequence fetal DNA circulating in maternal blood samples using Ion Proton semiconductor sequencing. The team used the semiconductor sequencing approach to do retrospective karyotyping on samples from 515 pregnant women, identifying known cases of fetal trisomies 21, 18, and 13 with sensitivities and specificities of more than 99 percent.

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A former Penn State Hershey Medical Center staffer has admitted to lying about skipping mandatory steps of genetic cancer tests he performed, the Associated Press reports.

The genome of a rare, red bat suggests that its effective population size has been in decline for thousands of years, according to a PLOS One study.

In Nature this week: investigation into the genetics of medulloblastoma, and more.

A project in the UK is to use genomic selection to speed spruce tree growth, according to Innovators Magazine.