I.Am
And no, there isn't anything inherently wrong with pulling a cell from an embryo, as long as it's going to be implanted. But it rarely happens that IVF involves only embryos that are going to be implanted.
According to the Mother Jones article I found on frozen embryos, IVF and stem cells, many countries in Europe, Italy and Germany, I believe they mentioned, only allow the creation of one embryo at a time for IVF. If it doesn't grow, they try again, but there's none of the let's-create-a-bunch-just-in-case, which is where the glut of frozen embryos in the US comes from. Companies don't want to take the one at a time route, because it's less profitable, and in the US, the government answers to business, not the other way around.
That's capitalism for you...
stare