First, the embryos are created in vitro which, in of itself, is a abomination.
Secondly, while it is theoretically possible that a single cell could be coaxed from an embryo according to this article, we have to ask ourselves "what will necessarily happen to the embryo after the single cell is coaxed from it?" Is that embryo immediately implanted into a human womb? Or is it frozen, to be thawed and reused later? Or is it flushed down the toilet? Somehow, I doubt the first.