Eggs, sperm & embryos
Trophectoderm cells are the ones sampled in a PGT biopsy, because taking a few of them avoids touching the inner cell mass. Its grade reflects the number and cohesion of these cells.
Also known as: TE, outer cells
Related Canada guides
Sources
- Canadian Fertility and Andrology Society (CFAS)
Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.