A mosaic embryo has cells that are euploid AND cells that are aneuploid. There can be degrees of mosaicism. So an embryo that is 40% mosaic has 60% euploid cells, and 40% aneuploid cells. A “low level mosaic” is 20-40% mosaic, while a “high level mosaic” is 40-80%. Read more in my blog about Mosaic embryos
Synonyms:
mosaic, mosaicism, mosaics