Scientists Make Model Embryos From Stem Cells To Study Key Steps In Human Development

Researchers created a structure using embryonic stem cells that mimics the earliest stages of human development in the womb. This image shows the structure breaking the symmetry of the sphere, which starts the development of more complex structures that eventually develop into a fetus.

Researchers hope these so-called embryoids could provide crucial new insights into how to treat infertility, prevent miscarriages and birth defects and many diseases. But they stir ethical concerns.

(Image credit: Mijo Simunovic, Ph.D., Simons Junior Fellow, The Rockefeller University)

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