Re: A bit gimmicky?
If I might add two further points...
Embryos are fully immersed in liquid and bouyancy means that the net effect of gravitation on the developing embryo is zero even for an elephant on Earth.
The likely importance of radiation on a developing embryo is so large that even if the mice had emerged hideously deformed, we'd assume that it was the radiation rather than the micro-gravity. We're therefore in the situation where we learn nothing about the effects of micro-gravity regardless of the result of the experiment.