1st synthetic mouse embryos — complete with beating hearts and brains — created with no sperm, eggs or womb

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Researchers developed synthetic mouse embryos that, between day 1 (top left) and day 8 (bottom right) of growing, formed a beating heart, an emerging blood circulation, a brain, a neural tube and an intestinal tract. For the first time, scientists have created mouse embryos in the lab without using any eggs or sperm and watched them grow outside the womb. To achieve this feat, the researchers use...

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