And da babies in-utero? Did the Infinity Gauntlet go by conception or 24-weeks?

Now you got this idea in my head, if it would have been possible to know if the Infinity Gauntlet considered conception, couldn’t a species, lets say humans, knowing “the snap” was a possible risk, create massive stores of zygotes kept on ice? Lets say 10 zygotes to every 1 living human. After the snap of “half” that would mean that instead of 50% of humans disappearing it would only have been 2.5%.

Moreover, since every other species would have lost 50% and been in chaos it would have been prime opportunity to conquer other species still in disarray.