We can print DNA iirc, and I’d imagine that tech will only improve with time, so if we really needed to keep some DNA from before some event that degrades all DNA afterwards, it might just be kept around as a computer file and synthesized as needed rather than frozen in living cells.

Giving birth to a kid born from your seventh great grandmother’s egg sounds like quite an odd scenario

Inb4 the knuckle-draggers claim they only want pre-covid vaxx blood.