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Before anyone comments - obviously, we don't have any experimental data. But do perhaps we have ISS or other data that can be extrapolated from?

What I'm asking specifically is, what do we currently know about the development of, for example, a fertilized chicken egg in Mars g? For the purposes of this question, assume that we've handled any radiation problems...

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  • $\begingroup$ We have very little data on low-gravity situations. All our data is at 0 or 1 G. E.g. it's not clear that health problems are proportional to gravity. $\endgroup$
    – Hobbes
    Jan 12, 2017 at 8:27
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    $\begingroup$ There is some data at more than 1 G. Some generations of laboratory mice were raised in a centrifuge on earth under some G. There were some experiments with a centrifuge in a satellite, see page 19 of iaaweb.org/iaa/Scientific%20Activity/Study%20Groups/… $\endgroup$
    – Uwe
    Jan 12, 2017 at 13:49
  • $\begingroup$ I don't know how the centrifuge approach escaped me. So you could place an egg in a centrifuge on the ISS and simulate Mars g. $\endgroup$ Jan 12, 2017 at 15:02
  • $\begingroup$ Not only eggs but also different small mammals, even for some generations. But such a rotating centrifuge would not be perfectly balanced and would disturb the microgravity environment of the ISS by vibrations. $\endgroup$
    – Uwe
    Jan 12, 2017 at 15:18
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    $\begingroup$ The ISS was supposed to have a centrifuge module for just this sort of experiment. It's rotting in a parking lot in Japan now. en.wikipedia.org/wiki/Centrifuge_Accommodations_Module $\endgroup$ Jan 14, 2017 at 23:56

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There's plenty of experimental data for microgravity conditions. But the only Mars-gravity experiment that I could find in the National Library of Medicine used an in vitro culture of plant cells. That's as close as we've come to an animal embryo. It found that

altered gravity effects include a serious disturbance of cell proliferation and growth, which are cellular functions essential for normal plant development.

-- "Simulated microgravity, Mars gravity, and 2g hypergravity affect cell cycle regulation, ribosome biogenesis, and epigenetics in Arabidopsis cell cultures," by Kamal et al, Scientific Reports 2018:6424, https://dx.doi.org/10.1038%2Fs41598-018-24942-7.

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