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Some newly reported clumps of cells growing in lab dishes have been hailed as the closest things to human embryos that scientists have ever made in the lab. These entities are human embryo models — ...

Scientists have created synthetic blobs that resemble a 14-day-old human embryo for the first time, meaning they can study embryo development beyond a particularly tricky period of pregnancy.

Changing just a single base in a specific DNA region of a female mouse embryo led to the development of male reproductive organs. A research team led by Nitzan Gonen at Bar-Ilan University in Israel h ...