This Week in PLOS

In PLOS One, researchers from Estonia, the US, and Canada describe placental gene expression profiles that seem to be associated with complications such as preeclampsia or gestational diabetes during pregnancy. Using array-based approaches to look at the levels of around 47,000 transcripts in placental tissue from early or mid-gestation, the team tracked down more than genes showing transcriptional shifts at mid-gestation.

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A phylogenetic analysis indicates two venomous Australian spiders are more closely related than thought, the International Business Times reports.

Technology Review reports that 2017 was the year of consumer genetic testing and that it could spur new analysis companies.

In Science this week: CRISPR-based approach for recording cellular events, and more.

A new company says it will analyze customers' genes to find them a suitable date, though Smithsonian magazine says the science behind it might be shaky.