However, I think this particular perk raises some interesting questions:
My first thought was that this is the ultimate in deferred life plans.
However, it also allows people to keep their options open and not sacrifice one opportunity for the other.
Perhaps, it's even a good counter argument to rationalising judging people by their sex rather than skill ("She can get pregnant so we better hire the male candidate.").
Nevertheless, it's in some way representative of a traditional work culture that values time over outcome and that considers time spent outside of work as something inherently bad or at least questionable.
It shows that the employer in this case exerts some degree of control over not just your working life but your life outside of work as well. At the very least because freezing your eggs brings about the expectation that you won't get pregnant all the same.