Mm.

And they, that stage which you talked about with a sort of, there's a hollow ball of cells.

The embryo becomes a hollow ball of cells, and there's a cluster of s- cells at o- one region within that ball, and that is known as the inner cell mass.

And that will give rise to the, the fetus.

And the cells on the outside single layer will give rise to the, the placenta.

And they find that by and large, the splitting event does not occur up until that point with, with a, just a few exceptions.

And so, a, it occurs sometime after they transfer the embryo, which is sometime after day five, day six.

Remind us just how much of a shock that was when that news emerged 30 years ago about Dolly.