[YayamiOmate]

I assume not. I am pretty confidnet the whole purpose is for the cells to never grow.

It works by editing cell information. If you let original cells divide there will be more unedited cells. So the eariler in the development you apply modification the more prononuced the effect. I think I read somewhere that they could alter amount of pigmentation by timing application of treatment. So that would fit.

It doesnt work by killing existing cells. Maybe it could work if old cells died and new ones would be edited, so they could gradually replace original ones but I guess its pretty hard to deliver gene editor to so many cells.

[The_rationalist]

Cells divide really slowly so if you could edit most cells in one day then only a negligible amount of new cells would be unedited.

* I guess its pretty hard to deliver gene editor to so many cells* this is the breakthrough waiting CRISPR and impossible to find a great up to date scientific resource on the technical issues and on the path towards progress.