Implantation in eutherians: Which came first, the inflammatory reaction or attachment? [Biological Sciences]

In PNAS, Griffith et al. (1) examine the transcriptome changes in the opossum uterus during pregnancy. The authors find that term pregnancy, which is correlated with the loss of the eggshell in the opossum, is characterized by an inflammatory response consistent with implantation in humans and mice. They suggest that...

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