Recently, I've heard of something called Oocyte cryopreservation, where a (fertilized, I think) egg from a woman is extracted, frozen and later thawed and reinserted into the woman to delay pregnancy.
Now, this is just an idea, I don't know if this is actually possible, but can this frozen egg be implanted into a different woman, who isn't the original owner of the egg? If yes, whose genes would the child inherit? Would it get genes from all three parents, or just from the original owner of the sperm and egg?