Scientists grow whole model of human embryo, without sperm or egg

  • how it started:

    > made using stem cells, looks like a textbook example of a real 14-day-old embryo.

    > It even released hormones that turned a pregnancy test positive in the lab.

    how it's going:

    > The researchers stress it would be unethical, illegal and actually impossible to achieve a pregnancy using these embryo models.

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