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But now, a team of scientists say it's technically possible after successfully developing young mouse embryos on board the International Space Station — the first study of its kind.
Scientists sent a batch of 720 fertilized mice embryos, frozen at the two-cell stage, to the space station back in August 2021. The embryos were inside specially designed chambers that allowed astronauts, who don't have expertise in embryo incubation, to thaw and incubate them. The final results showed that embryos grown on the space station had a 23.6 percent chance of reaching the blastocyst stage, while embryos in an artificial gravity scenario had a 29.5 percent chance. That's in comparison to embryos in a control group back on Earth that reached the stage at a rate of 61.2 percent.
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