Scientists from the University of Michigan have discovered that the growth of stem cells resemble structures of initial forms of human embryos. The only difference, is that the stem cells are unable to form organs such as the brain in order to provide human functions. In addition, embryos grown in labs die after a little more than a week. Still, to scientists, this proves that stem cells are able to remember the bodily functions that cells are suppose to do and grow to, which gives scientists hope that they will one day be able to grow humans in laboratories. However, there are ethical concerns regarding experiments such as these, and "embryos" cannot be studied for more than two weeks. Despite this, these scientists hope that their discoveries will one day allow them to grow human organs that can be given to people in need. The result will be that organ donations will no longer be necessary, because people who need new organs will be able to easily access he ones grown in laboratories.
https://www.technologyreview.com/s/608173/artificial-human-embryos-are-coming-and-no-one-knows-how-to-handle-them/
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