meetod raku pluripotentsuse kindlakstegemiseks, A method to determine if a cell really is pluripotent. This is done by taking an embryo at the two-cell stage and fusing the two cells by applying an electrical current. The resulting tetraploid cell will continue to divide, and all daughter cells will also be tetraploid (4n). If diploid pluripotent cells are injected and such an embryo is transplanted into the uterus, it will develop into a normal 2n embryo, whereas non-embryonic tissues are 4n. If the embryo can reproduce, then the initial analyzed cells have really been pluripotent.