Genetics

In cancer, an embryonic gene-silencing mechanism gone awry

There are some genes that are only activated in the very first days of an embryo's existence. Once they have accomplished their task, they are shut down forever, unlike most of our genes, which remain active throughout our ...

Medical research

Study implicates marijuana use in pregnancy problems

New research indicates marijuana-like compounds called endocannabinoids alter genes and biological signals critical to the formation of a normal placenta during pregnancy and may contribute to pregnancy complications like ...

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