This is interesting research. I'm taking up Stem Cell Biology right now and there's not a whole lot of information yet. Let's see what happens during the 64-200 cell count of the blastocyte and see whether the embryonic stem cells are viable multipotent cells and what differences they have over other human ESC's.

Well consider it this way, we are all part-animal as we are all derived from "lesser" species. It may not be a pure result when the embryo develops but that's why they're trying to figure it out.

For what it's worth, acquiring the embryonic stem cells is a less than 3% chance so it's very small. This is the part when the somatic cells are fused with the oocyte nucleus and activated. The positive side of things are more promising such as spinal cord injuries that have completely healed after grafting stem cells in the "bridge" they made on the portion of the severed spinal cord. The stem cells have been shown to communicate with normal somatic cells around the area and it's akin to them asking, "What cells are you? What cells do we need to become?" The stem cells will then differentiate into their corresponding cells and merge with the spinal cord tissue to reconnect the ends. It takes a while but it works, because after a few weeks or days yata the lab mouse was shown to be walking perfectly after the surgery, when previously, its hind legs were paralyzed typical of lumbar spinal cord injuries. But that's all they determined, they weren't knowledgeable yet on how the muscle "feel" became if the mice lost it or if it still has to be done via therapy (PT's and OT's). These concerns are all valid and still have no concrete answers.

Keep an open mind na lang.