[1][2] The proposal circumvents the most severe technological problems of other mainstream interstellar colonization concepts.
In contrast to the sleeper ship proposal, it does not require the more technically challenging 'freezing' of fully developed humans (see cryonics).
Regardless of the cargo used in any embryo space colonization scenario, the basic concept is that upon arrival of the embryo-carrying spacecraft (EIS) at the target planet, fully autonomous robots would build the first settlement on the planet and start growing food.
[1][2] Thereafter the first embryos could be unfrozen (or created using biosequenced or natural sperm and egg cells as outlined above).
[1][2] The embryos would need to develop in such artificial uteri until a large enough population existed to procreate by natural biological means.