This is where a small laser creates a very precise hole in the zona (or shell of the embryo), to assist in hatching and implantation. The zona usually hardens after being frozen and thawed so it makes it more difficult for the embryo to break out of its shell. And just for the record, the zona is not a living part of the embryo, so it does not harm the embryo at all.
So...we've got LAH and fluffy, triple layer walls!!! Sounds like a recipe for success. Grow Baby, Grow! Pregnancy test on November 2nd.